Malicious PDF — malware analysis report

Static analysis result for SHA-256 53dc79694df52e04…

MALICIOUS

PDF

74.5 KB Created: 2021-06-05 02:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3564c0691dc15e57f788d41a9414406f SHA-1: f754f1d03e489d4e6e37bf4ff7b5c15043712a3a SHA-256: 53dc79694df52e04d827e4f4acc6b9eb4f28ff553dec4d3e4f03abf25e5bb91f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, including one pointing to `https://queure.ru/pbw?utm_term=top+20+survival+foods+list`, suggesting a phishing or spamming operation. The document body, though partially corrupted, appears to be a lure for survival food information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://queure.ru/pbw?utm_term=top+20+survival+foods+list PDF link annotation
    • https://bafuvigugasud.weebly.com/uploads/1/3/5/3/135308410/5724197.pdfIn PDF document text
    • https://farupixin.weebly.com/uploads/1/3/4/3/134314126/punibolomoga-mazimof-jumigekokiveka.pdfIn PDF document text
    • https://magapevalapa.weebly.com/uploads/1/3/0/8/130874167/kelilamojosufat_ditojejov.pdfIn PDF document text
    • https://zivozisexime.weebly.com/uploads/1/3/2/8/132814465/manixudoxeluwifawu.pdfIn PDF document text
    • https://pibubeje.weebly.com/uploads/1/3/4/3/134374065/pilakaraduzogediwe.pdfIn PDF document text
    • https://wajadotufa.weebly.com/uploads/1/3/1/8/131857144/72ae122.pdfIn PDF document text
    • https://xosufovopoxom.weebly.com/uploads/1/3/5/2/135298930/kurigiwe.pdfIn PDF document text
    • https://dafuravo.weebly.com/uploads/1/3/4/8/134862971/diromikuvipiji.pdfIn PDF document text
    • https://xukokamil.weebly.com/uploads/1/3/4/3/134317204/xokarumesexamomefu.pdfIn PDF document text
    • https://nofoxevejumumu.weebly.com/uploads/1/3/1/8/131857054/ziribotegadamivilu.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/6f548af3-2337-4588-a617-9e8490e2e33e/fitowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e46e013-9538-46e2-9c99-657dd06774e5/how_to_read_a_legal_opinion_green_bag.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144412263/9805275689.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/35129454380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b617556-6cdc-4db5-90e2-06b7c6a5b645/rixepezukawixitofokajonar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7b328f-dbbb-4ac4-93af-bc796e3b4cfc/cracking_the_ap_english_language_and_composition_exam_practice_test_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4bd556-596a-46f4-bdb2-8c461c2b61bb/how_to_get_free_coins_and_stars_in_homescapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4035dc07-26d9-43d5-b232-1b38b74bb46f/capitalization_and_punctuation_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c2adfd4-e3d7-4f4e-abc7-e959c0db0713/grung_5e_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f214b4-df05-4eec-877d-7d40aa561b66/what_are_the_components_of_vision_and_mission_statement_and_explain.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_off0000e649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE649 5320 bytes
SHA-256: aea9ba9755750269ffdcff00bb4a26b04d04890670121958ae2b59df706c42fc
font_01_sfnt_off0000f87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87A 10784 bytes
SHA-256: 6a46d2bd8b5ad56b429bd848845dab9fa1f895a5f46f6c996494fac0ee03c9fa