Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f761318cd63f832…

MALICIOUS

PDF

135.3 KB Created: 2020-04-03 00:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1384c9845e90176c6434bf0491d4ae21 SHA-1: fad162296b5ea8d070b3407fb725b3a4c471a13b SHA-256: 1f761318cd63f832e76166b587348e8370c137102f8bb53bd66bd17186c05282
94 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary lure appears to be a link to 'http://tycoonhk.net/uploads/1/3/1/3/131398575/131398575.html#release+me+j+kenner+download', which is part of a larger network of similar domains. This suggests a campaign focused on driving traffic to potentially malicious or phishing-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://tycoonhk.net/uploads/1/3/1/3/131398575/131398575.html#release+me+j+kenner+download
    • http://canadiens.cool/uploads/1/3/0/6/130604416/fasolegekitutofu.pdf
    • http://monolid.net/uploads/1/3/0/6/130622063/tuvusu.pdf
    • http://roofinghoustontx.net/uploads/1/3/0/5/130588590/1325425.pdf
    • http://stirflow.net/uploads/1/3/0/4/130477882/gogunal_sutira.pdf
    • http://salonmetanoia.com/uploads/1/3/0/4/130483407/0420c2dd.pdf
    • http://thehealingheartinitiative.com/uploads/1/3/0/4/130435514/1643651.pdf
    • http://venuebleenterprises.com/uploads/1/3/0/6/130604922/xaxulaxuzikazag.pdf
    • http://mbidirect.com/uploads/1/3/0/2/130272600/64b59c0a7e5446.pdf
    • http://bbartbyangelica.com/uploads/1/3/0/7/130775744/5037410.pdf
    • http://thecrayonstory.com/uploads/1/3/1/0/131071312/fubefaroxum_vumoziwomal_jegak_kokidufujekaji.pdf
    • http://camplakesranch.com/uploads/1/3/0/4/130435959/lawiwagebasaba.pdf
    • http://tunedinteacher.com/uploads/1/3/0/5/130588550/xazipinaziwag_kasonaf.pdf
    • http://siimeenergy.com/uploads/1/3/1/0/131070342/kijip.pdf
    • http://jaspermardigras.com/uploads/1/3/0/3/130313127/badejonuliremikexu.pdf
    • http://alltalentmatter.org/uploads/1/3/0/2/130289291/3251537.pdf
    • http://mattkessler210.com/uploads/1/3/1/1/131164104/ziruzopidibigax.pdf
    • http://cleanersliverpool.co.uk/uploads/1/3/0/6/130639600/xanudagifig-rebojozudaj-miguwokeripizag.pdf
    • http://sheillanjoto.com/uploads/1/3/0/2/130288753/kiwasakaxaduda.pdf
    • http://octorock.net/uploads/1/3/0/4/130488974/3761020.pdf
    • http://mylifebuilder.com/uploads/1/3/0/7/130739419/zumedopojez.pdf
    • http://guidedannya.com/uploads/1/3/0/4/130488158/najaxizidufivimul.pdf
    • http://eastcobbrugbyclub.org/uploads/1/3/0/2/130287738/nukawelavap-timuwutod-vipumovolu.pdf
    • http://hsib.org/uploads/1/3/0/2/130270899/725857.pdf
    • http://golfmadisonsd.com/uploads/1/3/0/5/130541064/wozova_semepojewu_xuruvi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e490.bin
b3ed9bbeb5936becd05a71d636d7d64919bdf2a3034b837e93b9e70d14da94f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E490 8732 bytes
font_01_sfnt_off0002053a.bin
63f5e27ee3d24cc00d413e59c301cc73ab377383609796993547673f2bea898c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2053A 2600 bytes

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