Malicious PDF — malware analysis report

Static analysis result for SHA-256 753bcd43a19842a0…

MALICIOUS

PDF

39.4 KB Created: 2020-03-30 07:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8ab2ec3a6fdec44e2c497fa4ee8deedf SHA-1: a9925dc6a898413bd637dfb26d5acdf335d7c7f1 SHA-256: 753bcd43a19842a05bfa7534687285c67bde316877f19728030530ce7f3b411d
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs supports this assessment. No scripts were extracted, but the document's structure and embedded links suggest an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://74-123-76-199.mgwnet.com/uploads/1/3/0/3/130379427/130379427.html#public+transit+santa+rosa+to+san+francisco
    • http://nutritionbyzest.com/uploads/1/3/0/4/130483512/pelepav-bopivikixa-zupusuvodi-takazaxupad.pdf
    • http://mvctk.com/uploads/1/3/0/8/130874612/xakaxuvef.pdf
    • http://americascostcrisis.com/uploads/1/3/1/0/131070255/pigaxukokekar.pdf
    • http://simpleybubbley.org/uploads/1/3/0/8/130815026/gaveje-vagumumejo-vefirebanenamo.pdf
    • http://www.aecnwa.com/uploads/1/3/0/2/130287457/3116717.pdf
    • http://mta-sts.tummyandtot.com/uploads/1/3/0/6/130639705/rusarojujojisej.pdf
    • http://oxyzgen.com/uploads/1/3/0/2/130291591/b45c2e0.pdf
    • http://paintingcontractorct.com/uploads/1/3/1/4/131437981/worifu_tebimefareniri_wezebulokef_kofopipovufo.pdf
    • http://www.theseashanti.co.nz/uploads/1/3/0/7/130775501/52dce2f.pdf
    • http://hustleheelsandlips.com/uploads/1/3/0/3/130379804/94258.pdf
    • http://pretentiousglassco.com/uploads/1/3/0/4/130483852/pijup-tisopiwutuxux.pdf
    • http://myfanclub.net/uploads/1/3/0/2/130272571/sikafuna.pdf
    • http://danielshanethomas.com/uploads/1/3/1/0/131071315/6972226.pdf
    • http://blog.wealthywomandy.com/uploads/1/3/0/8/130874519/vipepem-sarupagor-mijoxanumix-ruluturin.pdf
    • http://shineonma.com/uploads/1/3/0/5/130550698/rutugufivimuto-zibusatu-vexomakaviripes-malejo.pdf
    • http://silvervalleycampground.com/uploads/1/3/0/6/130622093/0727e63ab907.pdf
    • http://bakersfieldtherapeuticbodyworks.com/uploads/1/3/0/2/130288630/wipajilinera-robumodo-lasowel-zabokiluwase.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_off00006f03.bin
be5e7a868c83c09b4ade852e60795c6d30e3115af06e4e251dfe7493d510cae0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F03 8464 bytes