Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c30461496c6932…

MALICIOUS

PDF

101.0 KB Created: 2021-07-01 15:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3309f959d196abb4cff2f1a7e45792e3 SHA-1: 2bc4b0afaf8fac881115f3aad9e201110e3b4e4d SHA-256: 38c30461496c6932b2b52ac6b73a42253a0c7f058e0219229302456cbfc994f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs lead to compromised WordPress upload directories, suggesting a tactic to host malicious content or redirect users to phishing sites. The primary attack pattern involves luring users to click on these links, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88094524846.pdf In PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/f6765e5c1f691b1395bbc224063078ab/fimota.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/dc4e97b5427ff7f09ed50fb3426282bc/22030532494.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/dofopasabatinojewivagaz.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/juruna.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9fe60af7e---roralaripaziwutiratiko.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/13257712884.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6cb48fadeda0f19bcd394cc49565b818/jexadiwefupozagobatepo.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be97c8f072---49888476267.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/eb6770fd2ab43c4722bbcd4fdf45a08c/34811028999.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/53672234318.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/43907294517.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0b3b0f2af---zuzifutuba.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02d925e8b4---luposevimiwo.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/81873246215.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/44oorgdqsd974f4t70trcmlv3i/zefiledulutegupumal.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/xetodeso.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/89ba3c5383d6c41675a1f5f17459bd60/zupovajugojukag.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160734badeb378---xolotebalizi.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed49eb4340---30303370704.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/vuzaropawifipu.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a444c8008b9---69015964114.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609620e8756d4---xirepinemimapojure.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+meaning+of+elohim+in+hebrewPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00016609.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16609 18920 bytes
SHA-256: 3d0353fb343a07a7c3967ad6f7f74f92fe80e89aae91a7bca372f65f5759956e
font_00_sfnt_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CF 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_02_sfnt_off0001164a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164A 22704 bytes
SHA-256: cbfe798da1d07a9efdf27cc64dbbcb110798d52cc22a4fe7b192f67eaf3bce1f
font_03_sfnt_off00014e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E1E 10584 bytes
SHA-256: 195d02b35f6876fba9143fae7a0e86e01a6a03a7a11b1420efdfa6fd3784e1ad

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