Malicious PDF — malware analysis report

Static analysis result for SHA-256 123aa945536115d0…

MALICIOUS

PDF

31.9 KB Created: 2020-05-16 20:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 5adbd16b126f9535b3ae44b34c524770 SHA-1: 6bf52054241e1728e25c96e21a1c6a6a112e0251 SHA-256: 123aa945536115d0f2b560c36c5747f00bbdf3e45e4b5518f272838fe237eaa8
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 likely attempt to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://supremecupcakez.com/uploads/1/3/0/4/130476642/130476642.html#latest+nice+guidelines+for+heart+failure PDF link annotation
    • http://workwithamma.com/uploads/1/3/1/3/131379031/gopota.pdfIn PDF document text
    • http://jamieparrish.com/uploads/1/3/0/4/130483514/6279782.pdfIn PDF document text
    • http://habetlercpa.ca/uploads/1/3/0/3/130379522/c4e6e27.pdfIn PDF document text
    • http://xlmarketservices.com/uploads/1/3/1/3/131398425/donefulo.pdfIn PDF document text
    • http://trishmorrislifecoach.com/uploads/1/3/0/6/130620168/vomaxul_kasegufet.pdfIn PDF document text
    • http://multimodalwritingcenter.com/uploads/1/3/0/5/130588763/keravapabu_pajolotu.pdfIn PDF document text
    • http://lillichart.com/uploads/1/3/1/3/131398045/174182.pdfIn PDF document text
    • http://dbrsalesandinstallations.com/uploads/1/3/0/2/130287871/welivupuvugaxapirot.pdfIn PDF document text
    • http://worldofmommytee.com/uploads/1/3/0/5/130539679/munugulaluzo-pibezo.pdfIn PDF document text
    • http://snowdogsofthegreatlakes.com/uploads/1/3/0/7/130740330/b3f1d.pdfIn PDF document text
    • http://wildwisconsinginseng.com/uploads/1/3/0/7/130739405/440524.pdfIn PDF document text
    • http://heritageshellfish.com/uploads/1/3/0/8/130814921/xowulif.pdfIn PDF document text
    • http://longmontbankruptcy.com/uploads/1/3/0/6/130605338/powawivazefefokatil.pdfIn PDF document text
    • http://thearcticangels.com/uploads/1/3/1/8/131858530/gupesifesepek.pdfIn PDF document text
    • http://mindfulofjiujitsu.com/uploads/1/3/0/2/130289734/xolukalasazojud.pdfIn PDF document text
    • http://903pros.com/uploads/1/3/0/9/130969633/3646974.pdfIn PDF document text
    • http://936-mulchin.net/uploads/1/3/0/7/130776271/4477043.pdfIn PDF document text
    • http://cfneu.org/uploads/1/3/0/4/130483616/fevenuzosuno_lumiguvisedafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5193 9984 bytes
SHA-256: 43a8fb17555d81f2ab809ea7d4c5079041277335c3bab77d6195f47b4773511f

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