Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc747fc4d7875549…

MALICIOUS

PDF

35.2 KB Created: 2020-05-14 18:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 999a8776861ef2b6c1f4a5ea920c9bb0 SHA-1: f8f59e0b8b2f23912677014f0c55876484c4aac0 SHA-256: cc747fc4d7875549957f5cb845705ae3f0b19ce9bd656bae2d0b4b945b662914
136 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of SEO poisoning or a link farm designed to distribute malicious content or redirect users to phishing sites. The ML classifier strongly supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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://financialcareforseniors.com/uploads/1/3/1/4/131406046/131406046.html#capsule+opacification+formation PDF link annotation
    • http://insightin2music.com/uploads/1/3/0/8/130874400/mukemibez_lizaxazoka.pdfIn PDF document text
    • http://auroraharristoys.com/uploads/1/3/0/5/130589140/f2c7d1f73e5d9b6.pdfIn PDF document text
    • http://entrepreneursover50.com/uploads/1/3/1/4/131406893/5463254.pdfIn PDF document text
    • http://invisalignedmonton.com/uploads/1/3/1/8/131871627/d4f768cc05b.pdfIn PDF document text
    • http://isissalvosilva.com/uploads/1/3/0/5/130588484/numipavid.pdfIn PDF document text
    • http://970dodoha.com/uploads/1/3/1/6/131606056/femuped.pdfIn PDF document text
    • http://unclaimedassetsnow.com/uploads/1/3/0/6/130639605/8361578.pdfIn PDF document text
    • http://colouryourworldhandmadejewellery.com/uploads/1/3/1/1/131164319/viwerenub_xiloviteniz_sitofax.pdfIn PDF document text
    • http://thehempfox.com/uploads/1/3/0/9/130969834/e8b6edab.pdfIn PDF document text
    • http://jevantechaneycandles.com/uploads/1/3/1/8/131856277/beborivix-guvup-jibetulizi.pdfIn PDF document text
    • http://prophetokello.ca/uploads/1/3/0/6/130639358/zeliz.pdfIn PDF document text
    • http://motortrainingtotaal.com/uploads/1/3/0/2/130291415/6a0c05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

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_off00005fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 10024 bytes
SHA-256: 9eb780d3fa432dbe1d1e766d9c6fee1fe42e78db0999a577f096b1eee2c344d7

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