Malicious PDF — malware analysis report

Static analysis result for SHA-256 400028857afd4b23…

MALICIOUS

PDF

74.0 KB Created: 2021-06-03 04:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f6903893f62558c36595bfbb617c61f7 SHA-1: e1d1fdce8208ad6e7ceea6ac7b1499dfaea7b3ff SHA-256: 400028857afd4b2389013e6f4b160696e799adc9cbf7c4be2163e21f8e64ee83
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains text related to Edgar Allan Poe, likely used as a lure. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/pbw?utm_term=what+is+the+message+of+the+poem+annabel+lee+by+edgar+allan+poe PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4504788/normal_60b061b716efd.pdfIn PDF document text
    • https://pujapuvefebawu.weebly.com/uploads/1/3/4/5/134581836/979aafe4d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_602102d5d8962.pdfIn PDF document text
    • https://xatufatug.weebly.com/uploads/1/3/4/5/134597760/7595426.pdfIn PDF document text
    • https://repowuvosifopel.weebly.com/uploads/1/3/6/0/136050091/vifip-bowomurawotu.pdfIn PDF document text
    • https://mujabimebedegi.weebly.com/uploads/1/3/4/2/134234846/355522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476429/normal_602f6c2d95735.pdfIn PDF document text
    • https://kaxunuruji.weebly.com/uploads/1/3/4/7/134725802/dajanilakuv.pdfIn PDF document text
    • https://rawabibag.weebly.com/uploads/1/3/4/8/134870232/puzotasomolob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_6057a1d8eea7c.pdfIn PDF document text
    • https://judirarizase.weebly.com/uploads/1/3/4/6/134645007/kuvoxugiweboguj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_5fdadb86d6240.pdfIn PDF document text
    • https://satotujum.weebly.com/uploads/1/3/4/3/134308249/takenewazabut-jawomepiwuki.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/06d2d4ee-ebb0-4808-981d-6da1da1a9b46/bunegobiboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48168930-2f85-4dff-bc4f-8a1188fc1601/vesexijufolev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f244d53b-bf2b-4d67-8923-73523b4bae8e/japomafekowotumosezuwo.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/55084086770.pdfIn PDF document text
    • http://sisagexal.pbworks.com/f/bridgerton_cast_really_dating.pdfIn PDF document text
    • http://bekivuxuga.pbworks.com/w/file/fetch/144425652/caractersticas_del_enfoque_cognitivo-conductual.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144539007/6932620698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed0a5989-88d2-40ba-ae50-b8e4867d58b0/how_do_magnetic_float_switches_work.pdfIn PDF document text
    • http://famukaser.pbworks.com/f/minecraft_free_download_unblocked_1.14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a0d10d-0368-4d39-a525-f1b492a559d1/spirit_blossom_thresh_chromas.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144425646/name_that_circle_part_answer_key_gina_wilson_2015.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_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 5712 bytes
SHA-256: c2aab2bf9be83d3160ca6d6a56b32fd67edf4206f944edaa8a044a4cb802f358
font_01_sfnt_off0000f4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C7 10928 bytes
SHA-256: 476c8e63cf7f8cd2fa5142ca8199ccfff55658950f7811450e9d7bae789fe950

Open this report in the interactive analyzer, or submit your own file for analysis.