Malicious PDF — malware analysis report

Static analysis result for SHA-256 84075a81d794e98b…

MALICIOUS

PDF

51.4 KB Created: 2020-03-10 02:47:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6313af2164b18dea4e5f29b52190a58a SHA-1: 8e7ee25c39ac9226da02cbbf32f54e863c19431e SHA-256: 84075a81d794e98b9a641fbae5544e1801af22e8b4191d2164b74c5a0d947538
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links points to a malicious intent, likely to redirect users to phishing or malware hosting sites.

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://2196eh.salon225.com/uploads/1/3/0/4/130488401/130488401.html#is+bottleneck+effect+genetic+drift
    • http://ubezpieczenia-czestochowa.eu/uploads/1/3/0/3/130313289/xurat-nojeluro-zomimogitamip-satuzonax.pdf
    • http://businessoglivsglede.com/uploads/1/3/0/2/130273896/sibijomi.pdf
    • http://creationsusa.org/uploads/1/3/0/5/130551957/melamiwanet-musekegibidino-lanefebuvim.pdf
    • http://ninaalessandri.com/uploads/1/3/0/2/130289775/dabetakuzanosu.pdf
    • http://vintagehomeatlanta.com/uploads/1/3/0/5/130551299/pafudivawogagakeg.pdf
    • http://manuatele.org/uploads/1/3/0/7/130775251/5199630.pdf
    • http://wirthlinlaw.com/uploads/1/3/0/7/130776068/281012.pdf
    • http://mesh1nfo.com/uploads/1/3/0/6/130621108/negawipoxawez.pdf
    • http://campuscrowd.in/uploads/1/3/0/4/130483558/115479.pdf
    • http://webmail.hrchc.org/uploads/1/3/0/8/130873978/xefujifefin-bazotalalep-zepipivekep.pdf
    • http://visualsensecrafts.co.uk/uploads/1/3/0/2/130271185/siginuviwubu-pikarez.pdf
    • http://jeffdanielsofficial.com/uploads/1/3/0/7/130739430/narud-jojijolowafewiz-fanaxepeneju.pdf
    • http://halcyonbusiness.com/uploads/1/3/0/7/130776712/vajoxigexe.pdf
    • http://mail.freedomfellowshipep.com/uploads/1/3/0/3/130379429/6296405.pdf
    • http://ntoumei.com/uploads/1/3/0/5/130588527/lokomem.pdf
    • http://mikaelchalyce.com/uploads/1/3/0/8/130813141/wemulogasumifinabuve.pdf
    • http://shaggy.inside.ccng-inc.com/uploads/1/3/0/5/130551126/vijogulubikako-nupotabelivel-ribivejege.pdf
    • http://www.agosoutheastblog.com/uploads/1/3/0/6/130639268/nawezigexa-revofiluxoreta-ruxif.pdf
    • http://luxhardgoods.com/uploads/1/3/0/3/130379741/99050.pdf
    • http://omt�nk.se/uploads/1/3/0/6/130621432/656b82d60aaf3.pdf
    • http://burtons-maplewood-farm.mynewonline.store/uploads/1/3/0/5/130540026/pikokunuzuvimel.pdf
    • http://xn--omtnk-ira.se/uploads/1/3/0/6/130621432/656b82d60aaf3.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_off00009cf7.bin
59a44e1e42823f823e6486c91a26a653c4c2c80e0c92fc69978cfded22393d08
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF7 9748 bytes