Malicious PDF — malware analysis report

Static analysis result for SHA-256 4917ed7701ad142e…

MALICIOUS

PDF

38.4 KB Created: 2020-05-15 04:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 0070ff3f30c6727cf304de4e7122f4cd SHA-1: 0913bdd9fabfe891b3f7f5c8e3044fb31c1bef85 SHA-256: 4917ed7701ad142ef23517bbeea3f7dc46238862b50644f7292a1f1a7e6bd5c8
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. No scripts were extracted from this sample, but the primary attack pattern is the redirection to numerous external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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://viannemusic.com/uploads/1/3/0/2/130272233/130272233.html#racing+games+to+play+with+friends+android PDF link annotation
    • http://welloffmedia.com/uploads/1/3/0/6/130605269/lipamum-bedemure-volof.pdfIn PDF document text
    • http://fdotlew.com/uploads/1/3/1/4/131406020/dfadc79588.pdfIn PDF document text
    • http://piknchuse.com/uploads/1/3/0/7/130776885/sarivamowov_dugizitefi_sevipezadijo_vevam.pdfIn PDF document text
    • http://sparta-ede.com/uploads/1/3/0/9/130969837/767016.pdfIn PDF document text
    • http://gospelbridge.org/uploads/1/3/0/7/130776042/rurinapixob_puwemabupo.pdfIn PDF document text
    • http://csantaella.com/uploads/1/3/0/6/130639581/81880.pdfIn PDF document text
    • http://campfireppc.org/uploads/1/3/0/4/130488542/pajasupoludoxijibuve.pdfIn PDF document text
    • http://marplenewtownroofingco.com/uploads/1/3/0/7/130776873/85abc9a31.pdfIn PDF document text
    • http://paramountplumbingservices.net/uploads/1/3/1/4/131453096/diweke.pdfIn PDF document text
    • http://richwifeclub.com/uploads/1/3/0/5/130539642/2024004.pdfIn PDF document text
    • http://avoloninternational.com/uploads/1/3/0/2/130287269/dalapa.pdfIn PDF document text
    • http://yksivloerkleden.nl/uploads/1/3/0/4/130435925/gefijirimuxofi.pdfIn PDF document text
    • http://jenniferji.com/uploads/1/3/0/2/130271114/merawenu.pdfIn PDF document text
    • http://mtbakercrossfit.com/uploads/1/3/1/8/131856034/lofawefowipiraga.pdfIn PDF document text
    • http://amyrenaudconsulting.com/uploads/1/3/1/3/131384618/cdf6aea5.pdfIn PDF document text
    • http://sentinelfirstaidtraining.com/uploads/1/3/0/4/130492963/fosiman_rarabejux.pdfIn PDF document text
    • http://isobelmargot-art.com/uploads/1/3/1/0/131070737/wakejufizotuk.pdfIn PDF document text
    • http://dimcreations.com/uploads/1/3/0/6/130639949/naxom.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 7

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_off00006ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA4 9968 bytes
SHA-256: 1e6e6856e00863a69eb586d54d385b74f22f012b014edd598b0ccd0bf1d600e7

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