Malicious PDF — malware analysis report

Static analysis result for SHA-256 b977496207d53161…

MALICIOUS

PDF

49.7 KB Created: 2020-03-08 05:32:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4584bb3f6a86c7785fd3b179d7c66958 SHA-1: 7c24dc034b85cfa0bdb84753e754058c362d818d SHA-256: b977496207d5316105cd29356d933bda8b0ad80d423571b6667d1b32fd03e3ee
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or content distribution tactic. The document body contains text related to medical conditions and software versions, but the primary malicious activity appears to be the mass linking to 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://www.adyamanagement.com/uploads/1/3/0/4/130483376/130483376.html#tnm+staging+gastric+cancer+radiology PDF link annotation
    • http://onecityhistoricalfoundation.com/uploads/1/3/0/7/130739298/dukukoxutaja_vonipizewuvoto_raxosinara_jiluponegonib.pdfIn PDF document text
    • http://helenlodgelpc.com/uploads/1/3/0/4/130435638/d4d5e0.pdfIn PDF document text
    • http://frontlinehustle.com/uploads/1/3/0/2/130287488/gexubiz_xurusavokuzifep_pegedawi.pdfIn PDF document text
    • http://nfsparts.com/uploads/1/3/0/7/130775493/1782144.pdfIn PDF document text
    • http://loveandadog.net/uploads/1/3/0/6/130621298/7fb66.pdfIn PDF document text
    • http://gopurefitness.com/uploads/1/3/0/2/130287243/cc492a9602552.pdfIn PDF document text
    • http://citywildpdx.com/uploads/1/3/0/5/130589360/601f7fb76ea88a.pdfIn PDF document text
    • http://personaloutfits.com/uploads/1/3/0/3/130323531/80f168343a7fd96.pdfIn PDF document text
    • http://bulletsandbombs.com/uploads/1/3/0/7/130739542/poxal-vuleri-jawimo.pdfIn PDF document text
    • http://host49.carmichaelnl.com/uploads/1/3/0/5/130588999/mevuveb.pdfIn PDF document text
    • http://tabletpack.net/uploads/1/3/0/5/130588542/1934479.pdfIn PDF document text
    • http://www.lindseydykstraproperties.com/uploads/1/3/0/6/130604511/cb287.pdfIn PDF document text
    • http://paperowlpress.com/uploads/1/3/0/5/130588433/87cab4231d17.pdfIn PDF document text
    • http://karenfavowalsh.com/uploads/1/3/0/3/130312912/rukovowokebe.pdfIn PDF document text
    • http://propertystars.biz/uploads/1/3/0/7/130740141/majenofaluxokug_nimanekipidetix_jarijifu_livigob.pdfIn PDF document text
    • http://www.501rentals.com/uploads/1/3/0/5/130588237/gazufuzibaxaxegaba.pdfIn PDF document text
    • http://ajconventions.com/uploads/1/3/0/6/130639997/e3fc032ff27f99.pdfIn PDF document text
    • http://louisemasonmetalartist.com/uploads/1/3/0/4/130435680/b28923f148f8c.pdfIn PDF document text
    • http://broderickingham.com/uploads/1/3/0/6/130604812/d13850c0b9eff8.pdfIn PDF document text
    • http://dogemoon.net/uploads/1/3/0/7/130775092/wevojapefo_wugizidetiwari_gakifibaj.pdfIn PDF document text
    • http://thepanda.net/uploads/1/3/0/4/130436204/641310.pdfIn PDF document text
    • http://daniel-alexandru-beres.com/uploads/1/3/0/7/130775503/jurixomupikom.pdfIn PDF document text
    • http://raysfinelinens.com/uploads/1/3/0/6/130605228/ropajaluma.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 6

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_off00009831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9831 8136 bytes
SHA-256: 3dfa716842d1ecb6d79ba78608feb19ae2ecebb0f59d71453c0dd79f0eb481a4

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