Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7aa27801c15dcb6…

MALICIOUS

PDF

98.8 KB Created: 2021-07-24 03:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7d74371cf32d1311eb73515dd585eb8e SHA-1: c1dd74f2446791760c2c6ad22ef3504654497676 SHA-256: b7aa27801c15dcb6effa888170b84167703df1dfb86a6c7318d8248fb5661021
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://berallebags.com/UploadFiles/FCKeditor/20210620000959.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082841845c37---jutujifumi.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/44771396366.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/f7a72c4f46e251773e240366f46efe7b/mofezodobawu.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/fd85b5e173c60a4a0c5608d87fa6cd55/75112865712.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/41da2f3fa43a67530b3eed8bd54620bd/96612608593.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/dilawomegapekefij.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160f29dcfb1606---35603170736.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/50320568507.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1281ee494---91694803638.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/d49ae0b4f5951bfb87427f90251d10d0/xotapatunonorabafaparuj.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/kuzudapubuli.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/rumuxujoto.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/c0aca99bf411e0093ba5248b8699950a/sokefigaf.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/dirivofezulegad.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091011fce577---tubulagejivetugadinex.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c724c9b706d---57445353550.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/63471680646.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e32e5b3c189---wurarup.pdfIn PDF document text
    • http://deryalvincotokurtarma.com/userfiles/file/lonixikejosaxigev.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/i6mhnaolemohf3l2ff6vst59tk/nafilofovowipisotakage.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rb4d4b3v1l9g46o6jqin9ma1m3/labekinatodaruwadoriraxuv.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/811c8b92263729bfee02fda7d335db9c/10807555681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=literary+terms+diagnostic+worksheet+answers+key+scholasticPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13477 11068 bytes
SHA-256: 2bc3000239e84721f100a5c14e1ad0c4d36c86503375ddb3d880b2d1ff81e7eb
font_02_sfnt_off00014de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE9 17812 bytes
SHA-256: 3777b9043bd4a939f0e4b81f798d1ae9a0dc99a6c97625d94890879e70f86ab0

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