Malicious PDF — malware analysis report

Static analysis result for SHA-256 7109cdf9b0efb778…

MALICIOUS

PDF

41.2 KB Created: 2020-03-08 07:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2cca87a13a0074fd959f60ad1008dfdc SHA-1: 3224ce8ab86954ccc9eaec5da4d41727feec87ec SHA-256: 7109cdf9b0efb7787ba75848107222adf05972de18edd840a391e3b2a5b06b2e
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files on various domains, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, includes a URL that appears to be a lure for users interested in scientific topics. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent, likely to redirect users to malicious websites or download further payloads.

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://riseshine.com.au/uploads/1/3/0/8/130874060/130874060.html#how+to+prepare+ethidium+bromide+for+gel+electrophoresis
    • http://nathannegri.com/uploads/1/3/0/4/130476587/samisinagegewafotek.pdf
    • http://gelatin12.goteamonline.com/uploads/1/3/0/4/130483819/kedag-fafefam.pdf
    • http://mingaretreatcenter.org/uploads/1/3/0/7/130776592/dad8dab82.pdf
    • http://nancy4me.com/uploads/1/3/0/4/130435688/falewivajemit.pdf
    • http://mostatedm.com/uploads/1/3/0/5/130540397/lepazitopi_lijepu_rofod.pdf
    • http://eterpath.com/uploads/1/3/0/4/130476277/bogobiwopelig.pdf
    • http://worthwhilesupply.co.uk/uploads/1/3/0/5/130547340/pomisab.pdf
    • http://drjamesworling.org/uploads/1/3/0/6/130620590/ed4776d832.pdf
    • http://softcom.live/uploads/1/3/0/6/130605369/8062753.pdf
    • http://www.thelivingwordchannel.com/uploads/1/3/0/6/130605036/56d2c6873cb576.pdf
    • http://panc.afaparents.org/uploads/1/3/0/7/130775137/kimoti.pdf
    • http://thedashorg.com/uploads/1/3/0/6/130604210/nozuponipefawanazo.pdf
    • http://www.sacramentorooferco.com/uploads/1/3/0/6/130621015/dc1ee.pdf
    • http://www.crystalclearing.com/uploads/1/3/0/4/130483230/441b3.pdf
    • http://rlx.space/uploads/1/3/0/2/130288542/b35f9d2ff8.pdf
    • http://www.blueoasisgroupllc.com/uploads/1/3/0/7/130775678/daduzamunawezu.pdf
    • http://90davida.com/uploads/1/3/0/5/130538839/difuzeser-nafirekaxatan-nefepusu-xazita.pdf
    • http://bravohobby.com/uploads/1/3/0/6/130621636/d27620aa.pdf
    • http://monkeywalldecals.net/uploads/1/3/0/6/130604793/xonudapirimu-nakejos-kezed-difowo.pdf
    • http://giventotour.com/uploads/1/3/0/5/130551708/budij_veterifozamekoz_tanogidamajeli_visitezesur.pdf
    • http://sonriseseattle.org/uploads/1/3/0/8/130813755/xotalefir-digodajejus-mavunezukegiwe.pdf
    • http://skyviewtrucking.com/uploads/1/3/0/6/130603753/zoremigisezire.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_off000076c1.bin
d39db4b60035efe577b4348dc3a417e4c14444dbe0d6c8afc978ee1bf03ee98d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C1 8316 bytes

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