Malicious PDF — malware analysis report

Static analysis result for SHA-256 2627465a0ea65983…

MALICIOUS

PDF

38.8 KB Created: 2020-03-26 07:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 81211fbfcfb385517f50c8f1bef22001 SHA-1: 2136d1968779616a47b644119a02726205f28aaf SHA-256: 2627465a0ea65983bd7621dac77240416d54c52f3b23291909306e9f207da82e
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a large number of external PDF links hosted on various domains. The document body contains a Portuguese phrase and metadata indicating it was generated by wkhtmltopdf, suggesting a potential lure or obfuscation tactic. No scripts were extracted, and the primary malicious activity appears to be the distribution of numerous external URLs.

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://alexmcmichael.com/uploads/1/3/0/5/130589135/130589135.html#boa+noite+meu+amor+te+amor PDF link annotation
    • http://masonkeim.net/uploads/1/3/0/7/130740616/220d0e118.pdfIn PDF document text
    • http://rccustomdoorsandrails.com/uploads/1/3/0/8/130874269/dasuniwetidula-sirenume-mamajak-batefafaner.pdfIn PDF document text
    • http://daklyndesign.com/uploads/1/3/0/6/130604621/miburowaketa-nemakomuwiv-pipolamevotex-mirewepona.pdfIn PDF document text
    • http://nickgrossman.net/uploads/1/3/0/6/130639675/3182544.pdfIn PDF document text
    • http://freeformsound.com/uploads/1/3/0/7/130738762/353513.pdfIn PDF document text
    • http://glengarymassagecenter.com/uploads/1/3/0/8/130813668/7462215.pdfIn PDF document text
    • http://frenchculinaryadventures.com/uploads/1/3/0/6/130620921/bujoxokexose.pdfIn PDF document text
    • http://www.cytoteconlinephilippines.com/uploads/1/3/0/7/130738714/peliviwakodix-fuzaxafulixidez-wuwufojixiliro.pdfIn PDF document text
    • http://cpanel.pamelajohnson.net/uploads/1/3/1/1/131164012/kazebujap.pdfIn PDF document text
    • http://maryleekemper.com/uploads/1/3/0/3/130324037/6522847.pdfIn PDF document text
    • http://carlospark-playablanca.com/uploads/1/3/0/8/130814285/1165698.pdfIn PDF document text
    • http://chitchatthisthat.com/uploads/1/3/0/6/130639449/nalulep_pelazobem_bewenukaweki_konazojupabirop.pdfIn PDF document text
    • http://mthopeucc.org/uploads/1/3/0/6/130603838/7847804.pdfIn PDF document text
    • http://charlottewildlife.org/uploads/1/3/0/6/130640223/wamugezixepivitebeto.pdfIn PDF document text
    • http://parklandrestorativejustice.ca/uploads/1/3/0/5/130543600/pibavobepu-nikumed-lerofirumidis-femomep.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 3

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_off00006ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCF 9636 bytes
SHA-256: 815a44af6779b936aa2ff5d3a3e01a85f48b4d166188ccd4226ef4a07989f7ed

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