Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2963b9a4fffbb6…

MALICIOUS

PDF

43.3 KB Created: 2020-05-21 21:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 3f759e37b0b9450a2ffe74696218d7b7 SHA-1: fce8c9d384a4f2b7ee9396b2677c7cced149fdab SHA-256: bd2963b9a4fffbb63f536573ac9d2ee9e821162d4094d27046126307f909ee4b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body text, though partially corrupted, includes the phrase 'Becas de permanencia escolar' which translates to 'Scholarship for school attendance', potentially a lure. No scripts were extracted from this sample.

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://259.undesirable.us/uploads/1/3/0/4/130476738/130476738.html#becas+de+permanencia+escolar PDF link annotation
    • http://theathelitefactory.com/uploads/1/3/1/4/131454536/mupopamivugumiba.pdfIn PDF document text
    • http://svensktspel.se/uploads/1/3/0/6/130603896/gibimelipu_vulidovibira.pdfIn PDF document text
    • http://elitebuckers.com/uploads/1/3/0/5/130550858/9216553.pdfIn PDF document text
    • http://kayscaninecaregiving.com/uploads/1/3/0/9/130969265/kurivo-sixogafesetaxo-fezaj.pdfIn PDF document text
    • http://monicasheaphotography.com/uploads/1/3/0/8/130813364/68c047e53c2fb11.pdfIn PDF document text
    • http://keysvision.com/uploads/1/3/1/4/131409167/jiredipixasi.pdfIn PDF document text
    • http://transition-to-tomorrow.com/uploads/1/3/1/4/131406749/c7744ea.pdfIn PDF document text
    • http://nebraskansunitedforthegoodlife.net/uploads/1/3/0/8/130814666/nukoxazujamik.pdfIn PDF document text
    • http://aclimited.org/uploads/1/3/1/6/131637714/munaj.pdfIn PDF document text
    • http://jerrodguillorycomedian.com/uploads/1/3/1/0/131069759/monolufoju.pdfIn PDF document text
    • http://jupitersparks.com/uploads/1/3/0/3/130312972/7619842.pdfIn PDF document text
    • http://imgsocial.info/uploads/1/3/0/2/130287538/lunozuki.pdfIn PDF document text
    • http://shells-creative.com/uploads/1/3/1/6/131637365/d73aea9f.pdfIn PDF document text
    • http://melodygabrielle.com/uploads/1/3/1/3/131379477/12fc046ff48b95.pdfIn PDF document text
    • http://arrowitconsulting.com/uploads/1/3/0/5/130550891/3015646fa5e.pdfIn PDF document text
    • http://spineinstituteofmichigan.net/uploads/1/3/1/3/131398362/lugezasado_gevukadajetuma_lurutafizet.pdfIn PDF document text
    • http://thebrittnyebee.com/uploads/1/3/0/2/130289756/f1e49476db9a1.pdfIn PDF document text
    • http://spacecoffee.com/uploads/1/3/1/4/131437294/kimil_joxididize.pdfIn PDF document text
    • http://goldenjaguarllc.com/uploads/1/3/0/7/130738962/zawexezevaz.pdfIn PDF document text
    • http://seniorchapelservices.org/uploads/1/3/1/6/131637953/duxekutubufuxap.pdfIn PDF document text
    • http://fullyinvolvedleather.com/uploads/1/3/1/6/131636651/ruwim.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 4

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_off00007bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBD 11628 bytes
SHA-256: acb47bff7e6f17d20f8f4d78e70f8972faa36e919b7cfdf69e3b31c1acbca51c

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