Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e80d35400bdabbf…

MALICIOUS

PDF

88.2 KB Created: 2021-04-03 09:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: eede21d6f3d9d70e6832a4cba952f038 SHA-1: 3c2f654fd4eeb3a217f8ff1fcc105a88187fa0c6 SHA-256: 2e80d35400bdabbfd71302b50f0c93b2297832472a76f686444a1efaa937f602
186 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'Google calendar widget settings android', likely a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/123?utm_term=google+calendar+widget+settings+android PDF link annotation
    • https://lunipudazu.weebly.com/uploads/1/3/4/4/134462877/5829192.pdfIn PDF document text
    • https://ditaluli.weebly.com/uploads/1/3/5/3/135325413/9905622.pdfIn PDF document text
    • https://sidafixeruj.weebly.com/uploads/1/3/2/6/132681612/dovog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459624/normal_5fe59e7e137d9.pdfIn PDF document text
    • https://rerofijujujedo.weebly.com/uploads/1/3/1/8/131872137/tibebovafanifulumalu.pdfIn PDF document text
    • http://wotegop.22web.org/fluval_206_filter_troubleshooting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_601da3409b90d.pdfIn PDF document text
    • http://wotegop.22web.org/gefomexo.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/114097.pdfIn PDF document text
    • https://povilaromegew.weebly.com/uploads/1/3/4/4/134486615/592c2070.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/nozonupezixebug_fexesoxu_lavunumoniboje.pdfIn PDF document text
    • https://nebilewanowuz.weebly.com/uploads/1/3/6/0/136083660/zafovufevupimafija.pdfIn PDF document text
    • https://lulapusorifat.weebly.com/uploads/1/3/1/4/131436971/zosufozuz.pdfIn PDF document text
    • https://gabejudunutulan.weebly.com/uploads/1/3/4/8/134887900/33e97927f6281.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471509/normal_5fe1abc58be58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suredutika.rf.gd/48616927510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c471ea-fd28-452e-9394-d23bf7d5e1f2/walking_dead_comics_new_world_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9940f718-fdd3-4b2d-98f4-c0998272cc03/how_do_you_update_snap_on_solus.pdfIn PDF document text
    • http://xovimed.rf.gd/tavosetewikilutun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6120fea9-e0a6-481c-88f0-83d613eb9f89/does_the_hormone_reset_diet_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850b9557-b6aa-4f2c-b4f2-49d029a57845/plane_shift_kaladesh_cleric_domains.pdfIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7D 5232 bytes
SHA-256: 390784f6465b033d4fdf0544c1243fdbf8e53178063f2d48c0ef753e03e88c0b
font_01_sfnt_off00012e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6D 10620 bytes
SHA-256: 9b2676fc19558400869637246f5b0394491379da24a16e860a377893f0e02a33