Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af7d5093c838558…

MALICIOUS

PDF

71.2 KB Created: 2021-06-23 07:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 934358b21d393ff4d87f1ccff78f4178 SHA-1: c6578e1b19f2ec4f36e8f1790ddcd19e195cfb87 SHA-256: 3af7d5093c8385584d372523049735023f8be5ec4f85a46c82a4130e73bbb2a6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially harmful external resources, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/7238001a1f9606d34848425cfa4dd9c2/fozinafup.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6015122139---zotogulibuwabunupidot.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/edh49jh4apbbtj7321kqea8hm4/finajexomigevol.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/90e3f35a9034db633a11a00e7d0cc42c/87260694858.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/761ijkvdj8qela3ukmua73b5n3/5699292278.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc25807c26---fezibupoboruzitaf.pdf
    • https://gulfsupremesa.com/ckfinder/userfiles/files/palos.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/r2ik3eusm9416htld0glsoilil/xidesaw.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f382dbc9b---zijudewivowodutekobudat.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608873be5b757---zozabuvosewoxu.pdf
    • https://gaziemirkentkonseyi.com/upload/files/paxezadete.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/cc558023e0352abf62afd19895b6714e/64584720190.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1e1c6bd81---15410781075.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/rj78od070mlogc9agku0og37u9/vukuwefadinevujomezi.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16080377582726---nedoniwuboga.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/aagga9t06ssnadnhp94ul3nt2o/31136580599.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=bless+the+lord+oh+my+soul+judith+mcallister
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccaa.bin
c01706841482daccf5e97a366e4771766f3925072ff19535f80069a8807854e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAA 5184 bytes
font_01_sfnt_off0000de51.bin
b89c3d86b5b6da33570d1ecf7e6017113de64abe0b8c1e0a4d75ba3846c0ccd1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 10260 bytes
font_02_sfnt_off00010183.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x10183 4324 bytes