Malicious PDF — malware analysis report

Static analysis result for SHA-256 181609912393483b…

MALICIOUS

PDF

79.6 KB Created: 2021-03-20 17:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 340be577d2efe5be915d59a33777458d SHA-1: 55ec8faf67628466b47537dd517e8bcb944d03fa SHA-256: 181609912393483b19c6859ecbe9a3348badad629198f245c317f5657b2ae61d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/strik?utm_term=why+is+my+epson+wf+2750+not+printing PDF link annotation
    • https://cdn.sqhk.co/karadirimose/gjhhnwP/easy_auto_clicker_2._0.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/wildgame_innovations_camera_repair.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/difuromikinazenizevom.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/bidGVia/pejuzizajuvuxufen.pdfIn PDF document text
    • http://dusanaputojinon.mygamesonline.org/67942914690.pdfIn PDF document text
    • http://zuxemesemubozo.mywebcommunity.org/ctet_paper_2_previous_year_question_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/gj7DgfC/kisufolog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gufivemiti.epizy.com/6704359066.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/what_is_horsey_sauce_at_arbys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c63a28-edfa-4204-831b-451af8841a05/78777990165.pdfIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_c259bfdc027d467e9561e122871ce45a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0e9b65-cec0-4a42-8523-9c4a65f25504/puvumupikenu.pdfIn PDF document text
    • http://desukavogoviz.epizy.com/jexosoveri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8fefa21-0001-4e3d-9400-13933044708b/wd_my_passport_wireless_pro_ios_app.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_6cc81752fc2448319077ee2232211323.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mulerux/b_tech_computer_science_books.pdfIn PDF document text
    • http://sikofus.epizy.com/binding_of_isaac_rebirth_blue_baby_guide.pdfIn PDF document text
    • http://vomonulesew.rf.gd/58731163089.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/baxefekawuwun.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 5544 bytes
SHA-256: 5289c1bc5283621ea6401b887bedbc1f6ad4b9140e382bd3c0d8022f018ad1ce
font_01_sfnt_off0000fe88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 10608 bytes
SHA-256: 08796aed396450cc0df3e0f1fe7e5d837d6b268c6049e0e69f4dbde8d63bbaca
font_02_sfnt_off000122e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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