Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23b28fa0e733df1…

MALICIOUS

PDF

32.7 KB Created: 2020-03-28 12:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1724e39305c31cd3f79ff25c16bce513 SHA-1: b99951b4ff64af7c6e6016ac725fab45813c4bed SHA-256: f23b28fa0e733df12dab04a60eee162274693c81dea010e93a1e877dabda8825
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 strongly indicated maliciousness. The document body contains text that appears to be a lure, referencing a 'Hi-point carbine owner's manual', which is likely a pretext to encourage users to click the embedded links. These links lead to various domains, suggesting a link farm or SEO poisoning attack designed to redirect users to malicious content.

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://fit1athletics.com/uploads/1/3/0/2/130289184/130289184.html#hi-point+carbine+owner%27s+manual
    • http://nourishinglynatural.com/uploads/1/3/0/7/130740444/belid.pdf
    • http://alalson.info/uploads/1/3/0/6/130622042/bc50b0.pdf
    • http://kissiadee.com/uploads/1/3/1/4/131406557/suxewari_genozadikuwo.pdf
    • http://www.designsbylindley.com/uploads/1/3/0/7/130738482/dorosonotukupo.pdf
    • http://lrjrhawks.org/uploads/1/3/1/0/131069860/kusanuwatapudidenu.pdf
    • http://ume.bh/uploads/1/3/0/6/130604036/1486913.pdf
    • http://cozycreekrealty.com/uploads/1/3/0/6/130621045/motanikokafopogor.pdf
    • http://restoration.fit/uploads/1/3/0/7/130740072/7862315.pdf
    • http://chambatacoffee.com/uploads/1/3/0/4/130435722/37bf385496.pdf
    • http://www.pyroartees.com/uploads/1/3/0/5/130588857/dacad3b5f33f.pdf
    • http://bestseminoletreeservice.com/uploads/1/3/0/3/130379252/36eea5.pdf
    • http://soulsup.com/uploads/1/3/0/3/130323616/vojejelafuziju.pdf
    • http://kellyjohnsonpainting.com/uploads/1/3/0/6/130604594/zesexepi-luladabifove.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_off000057a1.bin
925d63bda99e4c631fbc483b49afc9e2b873adcdf8bc54bc1283e4dd965baa9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57A1 7860 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.