Malicious PDF — malware analysis report

Static analysis result for SHA-256 8caa56e9f82327e2…

MALICIOUS

PDF

74.2 KB Created: 2021-03-24 07:04:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 77e5f1396b04ff06c87b0ba377ea81a4 SHA-1: baec8c75e4c346fcc1e8f1fdab35ab9c67a4a568 SHA-256: 8caa56e9f82327e27c37f0e7428458a6af399aac74536f62cdd7083a118d2c80
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 designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure point towards an attempt to lure victims to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/award?keyword=autobuses+la+union+bilbao+vitoria+pdf PDF link annotation
    • https://cdn.sqhk.co/zanemulazif/Fhajbha/49705991179.pdfIn PDF document text
    • https://rosififobagas.weebly.com/uploads/1/3/1/1/131164218/tigejudujewalitupar.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/bHni7Da/28480928627.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/gchcjgr/nikusa.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/sarah_plain_and_tall_series.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/black_swan_taleb_book_review8yj3q.pdfIn PDF document text
    • http://volanorirabu.22web.org/lajujopewozatawugo.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/WjjEyhh/ninda_sheebah_mp4.pdfIn PDF document text
    • https://nugukofijopi.weebly.com/uploads/1/3/2/7/132712180/vixidotaxal_sidekuxafapabi_jovavupa.pdfIn PDF document text
    • http://chambreapp.xyz/xawoviniwukisigepy2b.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/agjdhjM/78256667828.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/haRihjh/nevomemotidibopusaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/csJhc6A/planet_of_the_humans_documentary_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/zenipijujate/wihihhf/40718576430.pdfIn PDF document text
    • https://tunugezujemis.weebly.com/uploads/1/3/4/3/134307821/judiku-jisugiga-towawi-lerolozemiboz.pdfIn PDF document text
    • https://cdn.sqhk.co/kakovavop/jFjcjak/road_tripping_during_covid.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/tagugugulobakajopidigavap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bejuxufuvojofa.rf.gd/luzisejisewawumipijag.pdfIn PDF document text
    • http://lagiwugakit.rf.gd/93461593053.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF5 5224 bytes
SHA-256: 25b2ba755aa8e663661a72367616bba6990971f4ce077e58599b8d5a979ad2cf
font_01_sfnt_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 12364 bytes
SHA-256: 818cef11ec027fa8a1c5a8e3d5c20746ed37027e192bb6ffa405b9359416f75c

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