Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbe45669108b785…

MALICIOUS

PDF

40.5 KB Created: 2020-03-23 16:39:09 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5b7d454ab8c774e68bbc88b27f1ede6f SHA-1: 573d3c958105b776289c56bad1eec7a1b1d0e58c SHA-256: 7cbe45669108b785b7b443766f24a7d324f0c9c8ba60d85215b96eba506626d3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spam campaign. The document body, though partially corrupted, contains a title related to Romeo and Juliet and references wkhtmltopdf, indicating it was likely generated programmatically to host these links. No scripts were extracted, but the extensive use of external URLs suggests a redirection or content hosting mechanism.

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://smilehearthk.com/uploads/1/3/0/7/130740210/130740210.html#quienes+son+los+personajes+secundarios+de+la+obra+de+romeo+y+julieta
    • http://bubblebagsaustralia.com/uploads/1/3/0/2/130291689/pijuditorolemagufit.pdf
    • http://gearaddiction.org/uploads/1/3/0/6/130603721/f77824301.pdf
    • http://alyssup.com/uploads/1/3/0/7/130739980/832af47ec269a.pdf
    • http://theresascreativedesigns.net/uploads/1/3/0/6/130604379/gezufatavajixeneju.pdf
    • http://mail.kollerkaminbau.ch/uploads/1/3/0/8/130814448/3ad35e9e18.pdf
    • http://newenglandopportunityproject.org/uploads/1/3/0/5/130588336/wezin.pdf
    • http://213winchesterfarms.com/uploads/1/3/0/7/130739705/ritewirixagita_kokotovonunupim_lebamunosepixe_gorada.pdf
    • http://sailingwithsoul.com/uploads/1/3/0/7/130739427/xudutu_kegugatodogexuf_wujem_vabivirabifimoz.pdf
    • http://swiftgarageparts.com/uploads/1/3/0/5/130551441/gutasejo.pdf
    • http://nowphotobooths.com/uploads/1/3/0/7/130739478/nawuj.pdf
    • http://loudprofits.com/uploads/1/3/0/3/130313428/0570766d0.pdf
    • http://www.chrisflanagan.com/uploads/1/3/0/6/130640059/vuvavom_tidikobedumu_falurusenok.pdf
    • http://naturalyorganica.com/uploads/1/3/1/0/131070566/bd5bb.pdf
    • http://hacklerfineart.com/uploads/1/3/0/8/130874458/jagozoma_wesimi_fotewiju.pdf
    • http://lisamccafferty.com/uploads/1/3/0/8/130874517/belazodise.pdf
    • http://mailserver.theaccountsdeptne.com/uploads/1/3/0/3/130323900/mexufodunegavifezadu.pdf
    • http://elitecanineconcierge.com/uploads/1/3/0/7/130738641/lububipaxaz_zasikirotup_nilusugopuse_tizexetod.pdf
    • http://shotz.website/uploads/1/3/0/3/130379463/6537748.pdf
    • http://www.indoboheme.com/uploads/1/3/0/5/130588731/d62d45d.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_off000072a2.bin
8781b4a46bd40afc9b56189436e6e1754b1f612b19ddef2d2f981ad75b426f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A2 8496 bytes

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