Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e88db1e5db357a…

MALICIOUS

PDF

45.0 KB Created: 2020-03-24 09:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 41f616e9c5110ed2cd900e74076572f2 SHA-1: d96063a1b1b6f539ba7e75c65310621dfec6292d SHA-256: c6e88db1e5db357a77c8f7351d13db81fa7ee7e1cd0c448da097f7099fdc1a59
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning tactic to drive traffic to potentially malicious content. The document body contains garbled text and a reference to a stroller, which may be a lure. No scripts were extracted from this sample.

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://workinghusband.com/uploads/1/3/0/8/130814393/130814393.html#graco+snugride+30+stroller PDF link annotation
    • http://chaplainkelly.com/uploads/1/3/0/4/130436173/biduxenuruku.pdfIn PDF document text
    • http://r9.justinecandoit.com/uploads/1/3/0/8/130814060/7b80e1de120379.pdfIn PDF document text
    • http://laurascaligine.com/uploads/1/3/0/7/130739090/4800568.pdfIn PDF document text
    • http://mail.raeraesbakery.com/uploads/1/3/0/2/130272080/tegejakitobo_poxuk_mubulu_tomenaxiriwepaz.pdfIn PDF document text
    • http://carpetcleaningservicesla.com/uploads/1/3/0/4/130435516/jituvofemozobif-fuvevir.pdfIn PDF document text
    • http://uwwsales.com/uploads/1/3/0/8/130874330/fatumagozab.pdfIn PDF document text
    • http://slowurscroll.com/uploads/1/3/0/9/130969981/zurotuvaxugunole.pdfIn PDF document text
    • http://hostmaster.lehayet.com/uploads/1/3/0/4/130489025/kamufuvo.pdfIn PDF document text
    • http://serviziaeroportualisas.it/uploads/1/3/0/2/130272080/xemole-somasejutume.pdfIn PDF document text
    • http://www.martinklass.com/uploads/1/3/0/4/130483043/d0682.pdfIn PDF document text
    • http://damelec.net/uploads/1/3/0/6/130621137/3776220.pdfIn PDF document text
    • http://crumbsycookie.com/uploads/1/3/0/8/130873973/2456914.pdfIn PDF document text
    • http://www.nanba-ryu.com/uploads/1/3/0/6/130621915/c47164662ae.pdfIn PDF document text
    • http://skyeboundconstructions.com/uploads/1/3/0/8/130814586/texawizavudabisuxex.pdfIn PDF document text
    • http://mail.rcbnorthwestern.com/uploads/1/3/0/7/130738861/lalafuzik_fakebojo_vonuwijufibagi_xokugupatum.pdfIn PDF document text
    • http://www.graceholland.net/uploads/1/3/0/5/130589099/1d5dd6d1a68.pdfIn PDF document text
    • http://enlivenwall.com/uploads/1/3/0/4/130435881/881062d.pdfIn PDF document text
    • http://newgrowthhealth.com/uploads/1/3/0/5/130551429/buwodurijo-tinegipaxow-mogazavudubixev.pdfIn PDF document text
    • http://ekcoelearningcommons.com/uploads/1/3/0/4/130476045/94587b03b.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: ekcoelearningcommons.com 3 samples

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F46 9052 bytes
SHA-256: 541b1cf3d0ab8d80582d6a085be9236a65292627994ba6d533c1e6126caddfeb
font_01_sfnt_off0000919f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919F 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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