Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd59bae0c19d4a0c…

MALICIOUS

PDF

34.7 KB Created: 2020-05-15 04:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eba29bfdfa2acc25b1d847ce4c790ae2 SHA-1: 986649d9ae284b298f859b615165e38f8b738e2e SHA-256: bd59bae0c19d4a0cc2e584bb38d95ac65b0f73d619d2d54ea23bf8f21cc4bc06
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'Michigan aircraft registration form' and references the wkhtmltopdf tool, which could be a lure to disguise the malicious intent of directing users to numerous unrelated domains.

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://lotsforsalellc.com/uploads/1/3/0/7/130739081/130739081.html#michigan+aircraft+registration+form
    • http://owcoatings.com/uploads/1/3/0/5/130545742/zemovup-pesetal-sigemozasaxuf-juxel.pdf
    • http://motivemd.com/uploads/1/3/1/1/131164239/bizumes.pdf
    • http://northamericancontinent.com/uploads/1/3/0/2/130287502/weteveziwozetix-wugafigiru.pdf
    • http://energymastersofamerica.com/uploads/1/3/0/5/130550890/8351708.pdf
    • http://waqstudios.com/uploads/1/3/1/4/131453946/vesozixa.pdf
    • http://tusotolifestyle.com/uploads/1/3/0/5/130590243/47428.pdf
    • http://stevengethard.com/uploads/1/3/0/5/130588710/7bd828bba23d4.pdf
    • http://scheibnerbautista.com/uploads/1/3/0/7/130776158/vosabejugudadid.pdf
    • http://aadamtradersltd.com/uploads/1/3/0/5/130550925/xiwusafenusulikizo.pdf
    • http://stetic.ca/uploads/1/3/0/9/130970012/89bc780bc.pdf
    • http://thresholdlife.com/uploads/1/3/1/3/131379530/biguvolor.pdf
    • http://crimsonbuilt.com/uploads/1/3/0/2/130288861/mimuvos.pdf
    • http://weravecbd.com/uploads/1/3/0/5/130540159/b1a8b2c.pdf
    • http://colonoscopylosangeles.com/uploads/1/3/1/4/131407388/8827695.pdf
    • http://toolboyzbeatz.com/uploads/1/3/0/7/130776503/xuzuli-dexofijupaje-rojup.pdf
    • http://cropsperity.org/uploads/1/3/1/3/131380786/d4fdb13.pdf
    • http://grandessuenos.com/uploads/1/3/0/5/130551342/bevapomipora.pdf
    • http://projecthdata.org/uploads/1/3/1/6/131607805/66f758491f460.pdf
    • http://fortworthbooths.com/uploads/1/3/1/8/131856188/tumupibowab_mujet_pelusuxig.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dad.bin
2ebb2d0c65dcc918bf7d42c06357bdbc8c7d98ca79fc8b9116a8b3e1097559d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAD 9892 bytes