Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54d8d212fafbc06…

MALICIOUS

PDF

37.7 KB Created: 2020-05-18 21:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: c6a770a03f351d6c33596223296a8e7e SHA-1: d6b5bd7c0ec063f11028f5e2f2ebd21af9550204 SHA-256: b54d8d212fafbc06c28a5aafbf743099df2fdb077f35c68a95a9eea74f9723f6
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized with numeric slugs, indicating a link farm or SEO spam campaign. The document body, though partially corrupted, contains text related to a novela and the wkhtmltopdf tool, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious.

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://realitypropertiesllc.com/uploads/1/3/1/4/131407968/131407968.html#amor+eterno+novela+turca+final+en+espa%25C3%25B1ol PDF link annotation
    • http://lifecaredirections.com/uploads/1/3/1/4/131437532/vamoxafomirumobi.pdfIn PDF document text
    • http://cmi2011ltdeuropecom.com/uploads/1/3/0/6/130605501/6e6bd346a7.pdfIn PDF document text
    • http://theripsychicmedium.com/uploads/1/3/0/7/130739401/1f7b4ce3ea27fa6.pdfIn PDF document text
    • http://irokopostbooks.com/uploads/1/3/0/4/130476188/lesozelevijag_vokakid_pijumitajomala_sikilemilulu.pdfIn PDF document text
    • http://aacteacher.com/uploads/1/3/0/4/130483895/ddebbdef0904.pdfIn PDF document text
    • http://cooperdavidaakersmith.com/uploads/1/3/0/3/130313031/5987666.pdfIn PDF document text
    • http://modimody.com/uploads/1/3/1/3/131379803/kefulegopimobizeza.pdfIn PDF document text
    • http://nmation.org/uploads/1/3/0/5/130540266/6d0894000a7a2.pdfIn PDF document text
    • http://sugarmaplebooksellers.com/uploads/1/3/0/7/130776891/2903002.pdfIn PDF document text
    • http://djflakes.com/uploads/1/3/1/4/131455621/febivelegilur-zagiz-mesobudowozuwug.pdfIn PDF document text
    • http://20lakesantiquetractor.org/uploads/1/3/0/2/130287281/9262679.pdfIn PDF document text
    • http://dynamiccbd.net/uploads/1/3/0/7/130776082/5892136.pdfIn PDF document text
    • http://braasch-sicherheit.com/uploads/1/3/0/3/130379769/vezenogakud_dorajekasaz_sitatof_mofifod.pdfIn PDF document text
    • http://redhawkfoundation.org/uploads/1/3/1/8/131856222/3338385.pdfIn PDF document text
    • http://janis-lipinski.com/uploads/1/3/0/7/130740232/450497.pdfIn PDF document text
    • http://ourpromnight.com/uploads/1/3/0/9/130968961/dd2f76461ed.pdfIn PDF document text
    • http://sarahdoogan.com/uploads/1/3/0/5/130589085/48228cc6eb87a7.pdfIn PDF document text
    • http://txstateacctclub.com/uploads/1/3/0/8/130814065/2415265.pdfIn PDF document text
    • http://nekopalace.net/uploads/1/3/0/4/130476601/f9ef63ab42cb.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 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_off000062d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D9 11804 bytes
SHA-256: c5d6b0fc03ba35d49ca77c2302d468f69b009687cede0fbd290f249d34e878ec

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