Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4afd5aa56cdcd43…

MALICIOUS

PDF

40.8 KB Created: 2020-03-22 13:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: ae475df28f4e48c746ae84c2db129813 SHA-1: 2c910b8260f1f9fccfc626d1ab942a3cfa536a48 SHA-256: c4afd5aa56cdcd43cd2a3ad3c0b95496635ed77cc1c2d66203afda1e1b2eb914
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly supports the malicious verdict. The presence of a 'download' button heuristic further indicates a potential lure for malicious downloads.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://buyorsellyours.com/uploads/1/3/0/7/130775573/130775573.html#blueprint+for+progress+free PDF link annotation
    • http://hostmaster.psweloveu.com/uploads/1/3/0/5/130589371/65eff93.pdfIn PDF document text
    • http://www.sallieservsafe.com/uploads/1/3/0/5/130588856/6b528feeba9c8.pdfIn PDF document text
    • http://simplifyzero.com/uploads/1/3/0/8/130873996/9896828.pdfIn PDF document text
    • http://www.artyop.com/uploads/1/3/0/6/130621301/nopowekojuwojuv.pdfIn PDF document text
    • http://lizzyrees.com/uploads/1/3/0/3/130313400/337d56.pdfIn PDF document text
    • http://dentistmarketingtoday.com/uploads/1/3/0/4/130478067/mezeta-nekugunokukom.pdfIn PDF document text
    • http://www.stevieleestudio.com/uploads/1/3/0/6/130604493/latililusapo.pdfIn PDF document text
    • http://californiacastaway.com/uploads/1/3/0/4/130488470/78f6211ef.pdfIn PDF document text
    • http://famousjewishbirthdaycalendar.com/uploads/1/3/0/6/130604215/pitazaxi-rugofuweg-mevemagikakew.pdfIn PDF document text
    • http://advancedbiocomputing.org/uploads/1/3/0/4/130475992/rigokuweda-mezasuvobiwezon-farirafudekasup-govonunelukubu.pdfIn PDF document text
    • http://krwell.net/uploads/1/3/0/4/130490056/fiwus.pdfIn PDF document text
    • http://ilaugh.club/uploads/1/3/0/3/130323409/kanutemixarifu.pdfIn PDF document text
    • http://sharondycreations.com/uploads/1/3/0/2/130289242/5331858.pdfIn PDF document text
    • http://prontogarageparts.com/uploads/1/3/0/7/130776265/bufetejatepejukozoju.pdfIn PDF document text
    • http://holdsworthfamily.com/uploads/1/3/1/0/131070334/jidazanujowuvu_wofonunupa_boranamolubog.pdfIn PDF document text
    • http://www.germanschool.online/uploads/1/3/0/9/130969795/lurukedaxowurulu.pdfIn PDF document text
    • http://drtimjones.org/uploads/1/3/0/7/130738528/ae707.pdfIn PDF document text
    • http://osvwebsitestest.org/uploads/1/3/0/2/130274199/b5edc8880da8c.pdfIn PDF document text
    • http://web.editionrb.ch/uploads/1/3/0/6/130620585/289121.pdfIn PDF document text
    • http://www.northsidecigars.com/uploads/1/3/0/6/130605240/3effd3d0.pdfIn PDF document text
    • http://lawncarebenton.com/uploads/1/3/0/5/130588344/313344.pdfIn PDF document text
    • http://nissanpatrolparts.com/uploads/1/3/0/2/130289063/vexepusad_disobatiboloso.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

Related samples 3

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_off00007789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7789 7688 bytes
SHA-256: a8c3855960849e4debe2e25e188eb20be90091b822ff78cca09f352efe41c157

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