Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee716c92479345f…

MALICIOUS

PDF

74.0 KB Created: 2021-05-01 04:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99f7b68e11aed6677cae47a1a6e74486 SHA-1: da1ad3bfa8c0a6f3f62550f61b573564f254ce09 SHA-256: 5ee716c92479345f7764ba330da52fdfed3c1a4b5af8d3c1f4b0a1ad20520557
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8924

Heuristics 5

  • 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
  • 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://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160721571cd6ca---deribirupuxat.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f5b4e47ac---banemamunidezokajamo.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/nilln6dui3jkioj201porp7n4n/delibuzitofujanabilag.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d29a03974---kodemigenepag.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9fd89e347---10000022949.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160782bae1273c---taredoda.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607181a5ba272---38515084954.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e81bf42c76---gixizufejusefupe.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b3dee8ee---10984919290.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/mse71ihtodpbsfe8sllsst5j4n/jekotupotalavi.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fae2f08a6d---28791216217.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d47f8eaa7c---61564117757.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/4f3beef689079d415d45f5adff0fa8b2/61932326203.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd343500aa---losura.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/i69sapum730lt7qkp8kirbqkm1/viwaf.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d02028366f1e88160993ce696c325872/56836533825.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=emulator+android+10+mb
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37a.bin
cae7851aff9e26da16ee63dbb3d2797e2d65d74b05c5c91d79ee5c5a4da71874		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 4848 bytes
font_01_sfnt_off000103c2.bin
ef521f9fb2cd04ac53635ca7b705ac955be00a252efe32f883b1bdd74884891c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C2 10784 bytes

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