Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f9d3dc0f7e469b…

MALICIOUS

PDF

36.9 KB Created: 2020-04-18 09:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: bb9909106be9b0fe2c408f3dfa287010 SHA-1: 807ee8687abdb9633c1e7303adc1abea52be6bef SHA-256: 88f9d3dc0f7e469bcf84acff1bc5c7fb8d57de939d2106b76cf00c17c1797f18
144 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, forming a link farm, and one prominent link is presented as a 'Benevolent fund islamabad form'. The ML classifier strongly indicates maliciousness. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to a network of malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://ansorbanserpackedungjati.com/uploads/1/3/0/2/130289265/130289265.html#benevolent+fund+islamabad+form PDF link annotation
    • http://pro-manchesterbusinessconference.com/uploads/1/3/0/5/130538986/sufiwilapomiki_xakelujorafodax_malafejila_favesu.pdfIn PDF document text
    • http://australianminiatureponysociety.com/uploads/1/3/1/4/131438432/wuxiwugudu_tabajini_kawegukenibuwil.pdfIn PDF document text
    • http://spiralling-in.com/uploads/1/3/0/4/130489398/lotoxerilupawa_sanejowed_rivedazafizeb.pdfIn PDF document text
    • http://apolloconnectioncompany.com/uploads/1/3/0/6/130604098/zufinagib.pdfIn PDF document text
    • http://aaronindustriesinc.com/uploads/1/3/0/7/130776304/joxavun_giwufos_kogif.pdfIn PDF document text
    • http://kaylanicolebeauty.com/uploads/1/3/0/5/130588467/de2e8dc4a7080.pdfIn PDF document text
    • http://marymariamadonna.com/uploads/1/3/0/6/130620417/3e009a514120f4.pdfIn PDF document text
    • http://gamemasterj.com/uploads/1/3/0/6/130640163/1582137.pdfIn PDF document text
    • http://mangatagifts.com/uploads/1/3/0/7/130739122/lowemu-gepebolugabejin-zilimifi.pdfIn PDF document text
    • http://creekwoodorchestra.net/uploads/1/3/0/6/130604988/1404665.pdfIn PDF document text
    • http://photoartistry.co/uploads/1/3/0/4/130488994/luririb-sudetojureduji-dulaluzat-vesaxululuwinu.pdfIn PDF document text
    • http://paintingurway.com/uploads/1/3/0/3/130323932/fiben.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6526 9036 bytes
SHA-256: 01608960f19d64d6de66338013aeb2471ac01cdb17e570a32a0d713cc54efd0e

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