Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0dc30b39b4146b6…

MALICIOUS

PDF

43.1 KB Created: 2020-06-08 08:39:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12e6cd6b01caebabb71264f19c22187d SHA-1: 996d71f69c6158aa4f0b370e3331411a4097d185 SHA-256: b0dc30b39b4146b6834f0170a20ee7372e7cdfb96c393bb4c95be0e97df57fc0
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of SEO spam or a link farm designed to distribute malicious content or drive traffic. The ML classifier strongly supports the malicious verdict.

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://thereluctanttransformationalist.com/uploads/1/3/0/2/130289322/130289322.html#exercices+futur+simple+verbes+irr%25C3%25A9gu
    • http://mx.chiyoungkim.com/uploads/1/3/0/9/130970016/funirofuwowel-tifavirus-timedu-dusizavaduxi.pdf
    • http://coachjfalcon.com/uploads/1/3/1/8/131871856/2260124.pdf
    • http://mybespokejourney.com/uploads/1/3/0/5/130588787/rituxepepovu.pdf
    • http://mcgrath.business-facebook-covid19.com/uploads/1/3/0/8/130874504/xatate_kukoxol_vemas_dekekokozaroxum.pdf
    • http://melangeforthehome.com/uploads/1/3/0/2/130289313/8a44192c1.pdf
    • http://tulicencia.info/uploads/1/3/1/8/131871734/5401047.pdf
    • http://andrewjbarrett.com/uploads/1/3/1/4/131453260/897271529f8.pdf
    • http://kelseyleonofficial.com/uploads/1/3/0/7/130740598/koliribofomubid.pdf
    • http://mx.embassyif.org/uploads/1/3/0/8/130813818/rerakilenujezonu.pdf
    • http://discord.lsbrpc.net/uploads/1/3/1/1/131164076/tulogerusarupibaja.pdf
    • http://thewellbeinghub.services/uploads/1/3/1/3/131380109/girokajilur.pdf
    • http://djtonyrocks.com/uploads/1/3/0/6/130604585/4e3a9bb2.pdf
    • http://piratesisland.de/uploads/1/3/0/2/130289428/relonug.pdf
    • https://jafojub222685782.files.wordpress.com/2020/06/novilopagolixajojipe.pdf
    • https://juderoxer.files.wordpress.com/2020/06/65731432735.pdf
    • https://zosagadepug.files.wordpress.com/2020/06/sibegilazufoxovogifip.pdf
    • https://fatoturomixo.files.wordpress.com/2020/06/2656859330.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_off00006c34.bin
2aef20b6b34bae8b17ec4ccbdb79fb283d6b93a3d55e521780763955849a0ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 16760 bytes

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