Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eeb88f053fc0192…

MALICIOUS

PDF

83.4 KB Created: 2021-05-17 08:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ff487b7f8a9948ed1d259a11a5a94a2b SHA-1: 8aa291c4f6945ef5d3da8a3035e55f6c19c93a1a SHA-256: 5eeb88f053fc01920abcf396904ae4f8286176e4ff3c28d9e2b5ae12e340ad24
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/strik?utm_term=leaving+time+jodi+picoult+movie PDF link annotation
    • https://cdn.sqhk.co/xugiwatokax/hagj5hf/atualizar_email_automaticamente_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/djifogj/31576424122.pdfIn PDF document text
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/gonovaju-nipumuma.pdfIn PDF document text
    • https://sisareses.weebly.com/uploads/1/3/1/4/131454440/8350d.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/savegedefe.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/xodotozeduxikona.pdfIn PDF document text
    • https://cdn.sqhk.co/tamireto/ljcVjaS/dikalumirejexevinas.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/ibhhzxP/my_business_empire.pdfIn PDF document text
    • http://dobilarujokux.sportsontheweb.net/54766303611.pdfIn PDF document text
    • https://xugeguva.weebly.com/uploads/1/3/1/4/131438310/8b7e338df03de.pdfIn PDF document text
    • https://cdn.sqhk.co/jesuzedavoti/EHhjZSE/1423._dk_world_class_spirits.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_605af2a9369fc.pdfIn PDF document text
    • https://buvowanux.weebly.com/uploads/1/3/4/6/134685119/jivivuruxojoz-jepepaw-fejuwum-ribatatu.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/lghgghb/amazon_fur_tablets_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pinufizugal/ifibhie/cookie_clicker_sugar_lumps_hack_code.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/h2jjagc/dujeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5fd958b1dc26d.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/284d5ae2.pdfIn PDF document text
    • http://tapidiv.medianewsonline.com/leonardo_da_vinci_walter_isaacson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5fd638cb0a51d.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/add_and_subtract_like_fractions_worksheet.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
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_0a1dc5289b2343a0b78ea40a1db71d64.pdf?index=trueIn PDF document text
    • https://f2203da8-4034-475c-a980-a37079f2cd7f.filesusr.com/ugd/d29026_91c1b4e1fbfd43978a8aa0a064a0f55e.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 5080 bytes
SHA-256: 614825ebfd67edf8a87a84cacab8dd45604d6b90152e81e72fc3e29b15aff52f
font_01_sfnt_off00010bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 10784 bytes
SHA-256: 269380c75fda2ef5652168c6bec23c4186c09692e124c9828dd91a032ee0bf45
font_02_sfnt_off0001304d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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