Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d72c1b68289e682…

MALICIOUS

PDF

77.3 KB Created: 2021-03-16 00:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 54d28341a3299e76a3484255c4e02d53 SHA-1: 1b5b9be51560baa502eab1f62f736c4ac7a8bdd3 SHA-256: 2d72c1b68289e6823b78d402fe7df35c28cb56bc906865e48fb822cad1a17724
186 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as a link farm and contains a large number of external URLs pointing to disposable hosting services. The ML classifier and ClamAV also identified it as malicious. While no scripts were explicitly extracted, the structure and numerous external links suggest an intent to redirect users to potentially malicious content, likely for phishing or malware distribution.

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
  • 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://soxebez.ru/wix?keyword=the+knight%2527s+sword+quick+guide+osrs PDF link annotation
    • https://govepemifowen.weebly.com/uploads/1/3/4/3/134372812/ralinonex.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/gijgv6N/texas_unclaimed_property_reporting_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/dhfieEE/70785466820.pdfIn PDF document text
    • https://vewirorerisemi.weebly.com/uploads/1/3/4/6/134627211/juwopid-lekofatetoxewo-pitejep.pdfIn PDF document text
    • http://psychologyrelax.xyz/wivibire3mn7.pdfIn PDF document text
    • http://teleporttur.ru/96598886770rwzzq.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/yPZieia/stickman_gun_battle_simulator_mod_apk.pdfIn PDF document text
    • https://zovakobazala.weebly.com/uploads/1/3/1/4/131456363/ef3103488.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/ILpiiqv/82009933022.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/1325617.pdfIn PDF document text
    • http://runmasten.online/devenebijusajuriliruptz7jq.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/Gge7har/19247034576.pdfIn PDF document text
    • http://7lessons.website/taurus_pt111_g2_vs_millennium_proko2rh.pdfIn PDF document text
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/0b34507db3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5d0e9f-5447-4be9-ad73-e3952d274b60/todelek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c388bd6-7f6f-413f-a783-2416e1e28fea/xoneviresamorubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f4c8de-e2ea-4ab9-87f2-b8fbf1e103c9/sepo_y_sapo_inseparables.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_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 5224 bytes
SHA-256: d4dbe85727f39b1b8f6cbea2cc29460fb4dad1f3c0f74e0a16ecbc66562a7e7f
font_01_sfnt_off000102c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 11012 bytes
SHA-256: 4dd89e5a43b2057725b25d78c05d8b74db06191090ec0ac9dcbbe713735689f9

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