Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bc29f6177b2cb1…

MALICIOUS

PDF

38.8 KB Created: 2020-05-26 08:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 483d594e8040240df820f09f3232c7ac SHA-1: 728184f07a114dd5f049381e477e12df80c896f8 SHA-256: a9bc29f6177b2cb135d0b2a33bbe1725aa496f56d8fb88b72e0bc152e80635a2
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a link farm with 30 external PDF links. The document body also contains numerous URLs pointing to PDF files hosted on various domains. This suggests the primary purpose is to distribute or link to a large volume of other content, likely for SEO manipulation or to serve as a distribution point for further malicious payloads.

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://longlastingautodetail.com/uploads/1/3/0/6/130604764/130604764.html#kiriku+y+la+hechicera PDF link annotation
    • http://heatherweddings.com/uploads/1/3/0/6/130621928/nofuxojoz.pdfIn PDF document text
    • http://unsoyork.org/uploads/1/3/0/9/130969865/ximod-konafa-dasatej-nokosonulesopa.pdfIn PDF document text
    • http://nickgillette.com/uploads/1/3/1/4/131406835/1361267.pdfIn PDF document text
    • http://meganchristinabeauty.com/uploads/1/3/0/6/130639679/namoka.pdfIn PDF document text
    • http://nucleoama.com/uploads/1/3/1/3/131398545/ragagewekax_zurixifozewum_filutin_zamuganiwoxu.pdfIn PDF document text
    • http://salonbusinessowners.com/uploads/1/3/0/5/130546543/bawusivuse_novajelor.pdfIn PDF document text
    • http://collectioninmotion.nl/uploads/1/3/0/5/130589219/fixawonodanu.pdfIn PDF document text
    • http://tag-study.com/uploads/1/3/0/4/130435518/57a0f0e23.pdfIn PDF document text
    • http://embassyevents704.com/uploads/1/3/0/4/130483844/27955.pdfIn PDF document text
    • http://hashtag-extra.com/uploads/1/3/0/8/130815115/fawerawolebomibenoxo.pdfIn PDF document text
    • http://yogawithstacy.com/uploads/1/3/1/8/131856285/5311317.pdfIn PDF document text
    • http://azizfallnetworks.services/uploads/1/3/0/5/130551824/wizawedexoses.pdfIn PDF document text
    • http://fanaticfitnesswa.com/uploads/1/3/0/6/130621233/puseleburivudimi.pdfIn PDF document text
    • http://hostmaster.bournevalleychurches.org.uk/uploads/1/3/0/2/130270882/pepofozidepa.pdfIn PDF document text
    • http://4funphotography.com/uploads/1/3/1/8/131856338/juparitani.pdfIn PDF document text
    • http://myproelec.fr/uploads/1/3/0/6/130640218/5fbd59b0547a.pdfIn PDF document text
    • http://cap-geo.com/uploads/1/3/0/4/130489539/6854432.pdfIn PDF document text
    • http://birking.net/uploads/1/3/0/6/130621362/wivebaledotewerox.pdfIn PDF document text
    • http://ccutajarphotography.ca/uploads/1/3/0/5/130543158/wojejoxitig-tajirowope-vavifaz.pdfIn PDF document text
    • http://anitamasaitisdental.com/uploads/1/3/0/4/130476525/5256377.pdfIn PDF document text
    • http://nolahomesolutions.org/uploads/1/3/1/8/131871685/1cbf2a127.pdfIn PDF document text
    • http://gloupdaddy.com/uploads/1/3/0/6/130621120/pamiror-zaxezedomomas.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

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_off000069ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AE 11272 bytes
SHA-256: 4f78d44764efc2fe057e5dbde47ff7ac36abaa3521186f59534653392e331e3c

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