Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0fb1a1318a793e…

MALICIOUS

PDF

40.6 KB Created: 2020-05-14 22:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee2b4a423dfa88f91b28c2bf6a8abb3c SHA-1: 87fad016c478eae442265119295f996e385358a5 SHA-256: fe0fb1a1318a793ef7bb00f7d5cfdf947f0dd1f0370f628346cb2e3ec61d9c4d
94 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. The ML classifier also flagged this PDF as malicious with high confidence. The document body itself is largely unreadable, but the presence of numerous links to seemingly unrelated domains suggests a link farm or SEO manipulation tactic, potentially leading to malicious content or phishing pages. No scripts were extracted from this sample.

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://ctrventures.net/uploads/1/3/0/2/130289676/130289676.html#guided+tours+of+first+world+war+battlefields
    • http://jaderosealchemy.com/uploads/1/3/0/5/130540554/3218910.pdf
    • http://emeraldaffordablehousingcompliance.com/uploads/1/3/1/4/131406762/bebewaleravezo_tenuxivunilu_famuk.pdf
    • http://hackhustleacademy.com/uploads/1/3/0/9/130969837/risopiw_fukof_jalutivakax.pdf
    • http://reicheralsdiegeissens.org/uploads/1/3/0/5/130588168/bizexokudag-masegifo-ruvotirimuzevu.pdf
    • http://laurenshaw.org/uploads/1/3/0/5/130540046/6511225.pdf
    • http://hkitt.info/uploads/1/3/0/6/130621937/jumegu.pdf
    • http://functional-organics.com/uploads/1/3/0/2/130288481/gixidebotikidevukuxa.pdf
    • http://nchep2017.org/uploads/1/3/0/5/130589268/mifonudegixigok-gebirube.pdf
    • http://frackingprosandcons.info/uploads/1/3/1/3/131380612/zitavadew.pdf
    • http://terracaldaenergy.com/uploads/1/3/0/4/130435763/1df8606.pdf
    • http://funmoney4us.com/uploads/1/3/1/3/131383580/2201561.pdf
    • http://jufonline.com/uploads/1/3/0/3/130379326/9546922.pdf
    • http://invisibleme.space/uploads/1/3/1/4/131454501/tibigexi.pdf
    • http://csge.eu/uploads/1/3/1/4/131409508/532636.pdf
    • http://adamaslam.com/uploads/1/3/0/6/130620441/sulixanav.pdf
    • http://forubydesign.com/uploads/1/3/1/4/131483440/binovijaxamumej-rejol-nafamekexuvid-vunalisilu.pdf
    • http://ipiteam.com/uploads/1/3/0/5/130539442/5b20504814d.pdf
    • http://thenewbornnest.com/uploads/1/3/0/6/130639592/kolimodig.pdf
    • http://varietyvoice.com/uploads/1/3/0/6/130605269/tibafi.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_off000071e6.bin
6c02ff478ba06b46b3df9e157d714a4761f63a8f294b3e63615b148b1e26bd56
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E6 10792 bytes