Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af8169668bbd108…

MALICIOUS

PDF

104.8 KB Created: 2021-07-27 20:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4e580f8562b232388678b4e42eb6dff7 SHA-1: 30d6c768aa287e589c517a282f48294caf5a59b3 SHA-256: 0af8169668bbd10883f523f6934efe165099f1781b6594eedf8173f2ac24b6b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/568919d051af0b01bc9bd1c92aa54d30/15907312760.pdf In PDF document text
    • http://xiaohecollege.com/d/files/42536405080.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92dc278685---mowakoluviriwu.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7ag7a1hmim1kmmsk2697kbrvd6/vunuwemazopireka.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/838692b67a818d35c25269787b653d03/31792395305.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac29669788c---51918792789.pdfIn PDF document text
    • https://cape-electronics.com/media/file/nomewuzoposeba.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/julidivabe.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724e9dc84e4---83846681139.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/56366998482.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4a60838e5---62400422481.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/42763527198.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/40189875338.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075fcf3d59bf---durekafotavikasavim.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/a1c461e1a32b644947fce498eebb76f5/25713514758.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/59307322354.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/zugowatopetojuvedaligabo.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4c362a26c---kofeguveder.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cff77811c35---57852096499.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/14288b05822b630de16fc627c8b3dc6b/65442354416.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7483523da---26671403719.pdfIn PDF document text
    • https://temahr.hr/files/keraniwuzumizuginit.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608925f76f8be---22972594457.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/sowid.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/74648327194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+wear+scout+uniformPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BE 17280 bytes
SHA-256: 2a83bdb8decb54a8e13ea1f6e98f46d89ba4bfcfcbc284cf060b616fe4b52d4f
font_01_sfnt_off00016442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16442 10628 bytes
SHA-256: d94a90f7e6ad142b93e9af58d5a5a5746b3f1f346e2fbed5197b980ae2128bc6
font_02_sfnt_off00017ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1