Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9065bc08f198c0…

MALICIOUS

PDF

72.4 KB Created: 2021-10-02 14:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 011823cd402a8dcb309cc074044650f1 SHA-1: 4b3af15bdff70471bf9d9ca36b1d3d389f372d09 SHA-256: 2e9065bc08f198c0d1bb3cab96b91d75801500ba59e81cbe29a17989fa8eda44
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing campaign. The presence of embedded URLs and the 'SE_CALLBACK_LURE' heuristic strongly suggest the document's intent is to trick the user into initiating a callback, likely for a scam. No scripts were extracted, but the overall structure and heuristics point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f904c1b2ef---rabexupaxabapovuw.pdf In PDF document text
    • http://biswasi.com/userfiles/files/90664326185.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614faf9cbb4dd---56059982750.pdfIn PDF document text
    • http://contua.org/userfiles/file/dikupajemexibam.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/87548772332.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/50278693821.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210918183416_13a6yl.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/85217951485.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/kirowekufuxek.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/69387293909.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/54916653995.pdfIn PDF document text
    • http://konberdbio.com/upload/files/lonuw.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/12078652179.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/23431628982.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/pasazazedopavobugu.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144bc5276712---juzexuvifesesinon.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/tuzukavenid.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/8534081126.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/sugafelugalupiwi.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/paviniwatokeralada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=android+allow+unknown+sourcesPDF 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_off0000b477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB477 10524 bytes
SHA-256: 572b320f54140d84215ef93a7a91e7de285fbfec97af01e6a74a677462d990af
font_01_sfnt_off0000cc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC98 18676 bytes
SHA-256: 55a400d521743a78296e35e22165c70c2f29b7cd86b3f89fd1c6989c1b0ef58b
font_02_sfnt_off0000fc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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