Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f056b88896ad46…

MALICIOUS

PDF

133.1 KB Created: 2020-03-30 07:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: e1c957a7f2273b84d6c4f9fa065abd0c SHA-1: cba2d1e88e689f124b55272dae9e80aab80ca574 SHA-256: a6f056b88896ad465f569b5275840ad3f6d1a70c9910a310da5cfe0d46c27d1a
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to obscure malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security scanners. No scripts were extracted from this sample, limiting the ability to determine the exact payload or execution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chewoncakes.com/uploads/1/3/0/2/130272342/130272342.html#float+character+in+python+print PDF link annotation
    • http://blackandwhitewithadashofred.com/uploads/1/3/0/6/130622116/bizatarifaxixujol.pdfIn PDF document text
    • http://dennisqueen.net/uploads/1/3/0/8/130873890/bf0b08e4.pdfIn PDF document text
    • http://www.commons-middletown.com/uploads/1/3/0/2/130289277/6753641.pdfIn PDF document text
    • http://candorinternational.com/uploads/1/3/0/4/130478819/fb185.pdfIn PDF document text
    • http://zobleu.com/uploads/1/3/0/3/130313657/3221269.pdfIn PDF document text
    • http://rootingwithyou.com/uploads/1/3/0/2/130270912/6493937.pdfIn PDF document text
    • http://livinginnovations.net/uploads/1/3/0/5/130551475/9464038.pdfIn PDF document text
    • http://matchnrhyme.net/uploads/1/3/0/3/130313536/648965.pdfIn PDF document text
    • http://demirevolution.com/uploads/1/3/0/6/130639537/3806944.pdfIn PDF document text
    • http://lessformindfulness.org/uploads/1/3/0/3/130323555/64d07fc2e72.pdfIn PDF document text
    • http://vancouverchristians.com/uploads/1/3/0/5/130588864/3406305.pdfIn PDF document text
    • http://franciscolloberas.com/uploads/1/3/0/3/130324351/zuvilojinaxusa_valoluzuden_bozelasarijogaw_divovuj.pdfIn PDF document text
    • http://superiorarmorsystems.net/uploads/1/3/0/4/130483911/dimukuw_naworepagako_felirepum_begidajififin.pdfIn PDF document text
    • http://theretrobusiness.com/uploads/1/3/0/7/130738962/xozilugem-zeboz-bixupaxogabafo-nejiturupoxiba.pdfIn PDF document text
    • http://mrcardetailing.org/uploads/1/3/0/4/130483110/5443942.pdfIn PDF document text
    • http://dgiindex.biz/uploads/1/3/0/2/130289345/gijudopes.pdfIn PDF document text
    • http://carbonzeroinstitute.org/uploads/1/3/0/5/130543600/futudesewun_kubivomu.pdfIn PDF document text
    • http://coastcoffeetime.com/uploads/1/3/0/5/130588627/jugekepufufuz_digavaf_megufunonitik_tilogorupovodi.pdfIn PDF document text
    • http://kcbrewandcchew.com/uploads/1/3/0/9/130969002/xuwil.pdfIn PDF document text
    • http://buckssmokingbbq.com/uploads/1/3/1/4/131437044/nunogeninuzus.pdfIn PDF document text
    • http://mcmurtrymudrun.com/uploads/1/3/1/4/131453179/jigepasuduzeb_xozita_tepudi_rodajek.pdfIn PDF document text
    • http://angelintuitivereader.com/uploads/1/3/1/3/131379405/6778528.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
🗂 Part of campaign: thenightguru.com 4 samples

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Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cfdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFDF 11636 bytes
SHA-256: 96cdb5429a31f49f60a4a6b22e7d5618b430bcc5a3217310aa3b5c0a7ff16d46
font_01_sfnt_off0001f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F99E 3180 bytes
SHA-256: 096fc6f84e1bbcc17b8d2499aaf628a5c22a68506156e9b5e923bb6b071a0b7f

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