Malicious PDF — malware analysis report

Static analysis result for SHA-256 f699e2e51e9283d4…

MALICIOUS

PDF

158.2 KB Created: 2021-06-26 22:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 66bffc5f3785ba0af223450090a1f7b6 SHA-1: 0dc503f0d02ac1c9415c89287a416c97703a59c8 SHA-256: f699e2e51e9283d4b13a1885f5c82943c8d184eb2218476ae0c9ff84bc40fd8b
196 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and linked URLs indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/u0ev7ekremdkg53ov3rmpoorii/77482155964.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/579c5eb9311b3c179167c4a6dcdb988d/98890805211.pdf
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46199629081.pdf
    • https://petek.biz/resimler/files/vugoxotiw.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3987cbc10---namotoganupuwuxu.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f58ea6843adaf8732df63cbc5b02dd87/25745222883.pdf
    • http://whuntex.ru/userfiles/file/55284343435.pdf
    • http://olgapolyakova.com/files/files/97876424627.pdf
    • http://appartenvue.net/appart/upload/images/matidatakibogebugojobudid.pdf
    • http://mpti.ru/userfiles/file/pufowobi.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ce9505f9d55a68d386d1b3c76435b3c7/kizesoruzu.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e25ccef518---51597423432.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607de65f1c8b2---xatowim.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/298c9daa2125862202fe06f1b5301d8e/tutedigenur.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/8d4db0898eae3c070941e7423456660c/20780343772.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/8259ee14337f2866f6d18115cd969af6/7933634995.pdf
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/timupovovonofoli.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb52a78a975---71597922110.pdf
    • https://manuscripthandler.com/userfiles/file/sevinebuwojegafol.pdf
    • http://dallapietamarchisio.it/userfiles/files/puwafowevetuwesivede.pdf
    • http://nfc.soo.jp/file/75030075633.pdf
    • http://constantemail.com/userfiles/file/1623245627pajaturipixilifudanabaju.pdf
    • https://actaviaserica.org/board/file/files/zixigega.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/vipuv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+weeknd+trilogy+font
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000207d7.bin
e7d068c3289dfe69da574a995ef81dc916e28511c2060117748f3cb17ff21849
pdf-font-stream PDF embedded font (sfnt) at offset 0x207D7 19208 bytes
font_01_sfnt_off000239b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x239B2 16792 bytes
font_02_sfnt_off000251c9.bin
0228e239c4147e61ddfaa3db30f8a7a2b7bb37f1b996480e47d1d57d923c5744
pdf-font-stream PDF embedded font (sfnt) at offset 0x251C9 10556 bytes