Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf001a0e3b44612…

MALICIOUS

PDF

39.7 KB Created: 2020-03-21 18:23:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6c3e69c847786652243959f23260c9f2 SHA-1: 7f4b2e5a9ac95611ccb489ab7d48bf7d5af4c7a8 SHA-256: acf001a0e3b44612e22d7bce6d7b2277ac6c2831e3802eb893f633e3a3a955ef
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains fragments of URLs and text related to fractions, which may be a lure. No scripts were extracted from this sample. The primary attack pattern involves directing users to a multitude of external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://sugarheadcreations.com/uploads/1/3/0/2/130270974/130270974.html#fracciones+homog%C3%A9neas+y+heterog%C3%A9neas+con+ejemplos PDF link annotation
    • http://stewies.store/uploads/1/3/0/5/130551558/5112319.pdfIn PDF document text
    • http://countrygirl413.com/uploads/1/3/0/6/130621809/kagodupekez.pdfIn PDF document text
    • http://allbodiesbeautiful.com/uploads/1/3/0/7/130738555/5948910.pdfIn PDF document text
    • http://theperfectblendcatering.com/uploads/1/3/0/6/130640139/2051966.pdfIn PDF document text
    • http://www.scarsoftheunfoughtbattle.co.uk/uploads/1/3/0/6/130605133/2350036.pdfIn PDF document text
    • http://mail.bafustago.com/uploads/1/3/0/5/130551135/lunurodugamu.pdfIn PDF document text
    • http://apexgraniteocala.com/uploads/1/3/0/8/130814993/gatiwofem.pdfIn PDF document text
    • http://www.mshdesignstudio.com/uploads/1/3/0/5/130543006/bimunukok.pdfIn PDF document text
    • http://dreamkleen.com/uploads/1/3/0/8/130873876/dee4c7c65a3f.pdfIn PDF document text
    • http://perfectbabysa.co.za/uploads/1/3/0/3/130323430/8581133905.pdfIn PDF document text
    • http://jacpadala.com/uploads/1/3/0/7/130775049/tezuzalavusame.pdfIn PDF document text
    • http://solutioncities.org/uploads/1/3/0/6/130639205/3574990.pdfIn PDF document text
    • http://omahafoodguide.com/uploads/1/3/1/0/131070098/cdc1b3aca35.pdfIn PDF document text
    • http://backandbarberingstudio.ca/uploads/1/3/0/4/130476309/8956199.pdfIn PDF document text
    • http://trust-trade.net/uploads/1/3/0/2/130289453/xovukawibareje.pdfIn PDF document text
    • http://dru.solutions/uploads/1/3/0/7/130775853/9672657.pdfIn PDF document text
    • http://tllafleur.com/uploads/1/3/0/6/130604408/3299973.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 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_off00006e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1D 8952 bytes
SHA-256: 2d288b237efb30ce5d48b8dd8d47d83550a3444336ddefc234a5108f688d5122

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