Malicious PDF — malware analysis report

Static analysis result for SHA-256 901dc10ea172da26…

MALICIOUS

PDF

85.3 KB Created: 2021-06-14 01:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 21ac8a1be0bd9d9753ab21011cf846b1 SHA-1: 321d11fd99fe75254dfd9544bb573587f3ca3173 SHA-256: 901dc10ea172da264df6787d8652d8748eed12c2fba179ac0d02d95793ed9121
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious payloads. The document body, though heavily obfuscated, appears to be a lure for a movie download, which is a common social engineering tactic.

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://smidgel.ru/uplcv?utm_term=shadi+me+zaroor+aana+2017+full+movie PDF link annotation
    • https://mytalk7.com/_UploadFile/Images/file/93105377048.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7d8bdd8bd---25214342564.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6935033f5b8c3972876c156f0d0c26d6/74982170834.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a189a15cd49---mukaxoneruvozirazorix.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0660cbdfd6---16652047207.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2c820a326---sidoxafavefesenuvufe.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/nelusapolakizob.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/9bb83006e37a7b0755f6a5d2b5b612b8/36786376284.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863d20b7bf3---99128103053.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/d11088b8c0f5e3bd657e58a40a109c69/98236235288.pdfIn PDF document text
    • http://fygl.net/uploads/file/032028455295.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/13174001490.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/fb029c23ac50f6994fe57f7dae5387f2/35478756170.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021610192476881.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/97229793902.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d50583ca575536c0a0d3ee5ba46617b/4558656125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0000fa4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4C 5588 bytes
SHA-256: 938b5521c50c8a447a8ca6fa2a98e3bb9b84f2795b5c2705c7ccdedb1ebb3c96
font_01_sfnt_off00010d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3A 10956 bytes
SHA-256: a874e447bbca01c58999e0ad45ac1ddcae89bf67e4839f9ee72969e2f715da01
font_02_sfnt_off000132a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A3 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1