Malicious PDF — malware analysis report

Static analysis result for SHA-256 70678eff986b327d…

MALICIOUS

PDF

76.3 KB Created: 2021-06-01 19:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c0da2cd2023cf8402e1b92e223433750 SHA-1: 0369e992a855840cc2bb661fb2d3d3b3676881ea SHA-256: 70678eff986b327d6408dcf9250a13e177e4e9323b61ad1a6e601eabd579ed5d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a mass of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded content appears to be a search query about downloading iCloud photos, likely a lure to disguise the malicious intent of the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://inwebjor.ru/pbw?utm_term=how+do+i+download+all+photos+from+icloud+to+my+pc PDF link annotation
    • https://janogawe.weebly.com/uploads/1/3/0/7/130776821/c8f1a.pdfIn PDF document text
    • https://gunowiwusofemu.weebly.com/uploads/1/3/4/7/134705227/3918659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_601d5c15cb92b.pdfIn PDF document text
    • https://gasupajo.weebly.com/uploads/1/3/4/6/134624661/kufas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5fd994545d46f.pdfIn PDF document text
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/643b8b779d.pdfIn PDF document text
    • https://zekisotirateme.weebly.com/uploads/1/3/4/3/134368555/4393b4a5.pdfIn PDF document text
    • https://makukojubava.weebly.com/uploads/1/3/0/7/130739489/tapemifidote_meruvomaj_xemuzom_mirisorim.pdfIn PDF document text
    • https://tofesozexeraj.weebly.com/uploads/1/3/4/6/134610570/razevesuxigogasebubo.pdfIn PDF document text
    • https://zejifibesus.weebly.com/uploads/1/3/4/5/134586543/e28f4.pdfIn PDF document text
    • https://fasitidepev.weebly.com/uploads/1/3/4/3/134312072/9395155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_604437504a2a3.pdfIn PDF document text
    • https://numudapusolu.weebly.com/uploads/1/3/4/6/134628478/lofebuz.pdfIn PDF document text
    • https://bijasekimuku.weebly.com/uploads/1/3/4/5/134593614/2273972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460233/normal_606026bb41da1.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4451229/normal_60b5105cb0ac9.pdfIn PDF document text
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/9317424.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://jajafad.pbworks.com/w/file/fetch/144419145/suvarudezi.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144451632/38636804561.pdfIn PDF document text
    • http://xofitesu.pbworks.com/w/file/fetch/144448011/kedoj.pdfIn PDF document text
    • http://bovozajezo.pbworks.com/w/file/fetch/144445845/descendentes_3_filme_completo_dublado_gratis_download.pdfIn PDF document text
    • http://kukepofarit.pbworks.com/f/naruto_shippuden_ultimate_ninja_impact_ppsspp_download_500mb.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/mole_to_mole_ratio_practice_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF92 5316 bytes
SHA-256: f77402ee71c5e926f580152cbe8d5b7df3d35f79c5f2f1e087a29759936b5c73
font_01_sfnt_off0000f181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 10364 bytes
SHA-256: d791a028275d1988f74e4c9ed778df464c2ab6994bb79b7396ff7dc6a12dd598
font_02_sfnt_off00011522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11522 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3