Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad684c3fae2b1ebc…

MALICIOUS

PDF

46.0 KB Created: 2020-05-25 20:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 145adab02b6d03eef806496da7eb9335 SHA-1: 0eb1d55fa08e6a82dffa8b34161dc5d4ed9883d1 SHA-256: ad684c3fae2b1ebc8aa5de08b52776bda2e0b5987ed8c605bfa72da03535ff1b
104 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, many of which point to other PDF files. This suggests a link farm designed to host malicious content or redirect users to phishing sites. The presence of a 'download' button lure further supports this. No scripts were extracted, limiting the ability to determine the exact payload or delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://permaculturefoundationofhawaii.com/uploads/1/3/0/5/130539820/130539820.html#lakka+bios+pack+download PDF link annotation
    • http://hostmaster.spooktacularevents.com/uploads/1/3/0/7/130739524/9008413.pdfIn PDF document text
    • http://infermatic.com/uploads/1/3/1/4/131406732/jetaxukamum_rijalufurik_dowufuzufa_xijikoxemuxozu.pdfIn PDF document text
    • http://olddavistownfarm.com/uploads/1/3/0/5/130588410/2993183.pdfIn PDF document text
    • http://hotspotairpods.com/uploads/1/3/1/6/131607110/8699698.pdfIn PDF document text
    • http://boyzweekend.net/uploads/1/3/0/8/130874513/7949218.pdfIn PDF document text
    • http://nblbball.com/uploads/1/3/1/3/131379700/wodagumejo.pdfIn PDF document text
    • http://nathaliablachford.com/uploads/1/3/1/4/131438874/tefajarubesezakefa.pdfIn PDF document text
    • http://terredevanille.com/uploads/1/3/1/8/131872138/joguludu_gomubujufa_nuwadikadezotel_vujidojof.pdfIn PDF document text
    • http://crystalmoonsavage.com/uploads/1/3/1/4/131453274/58c5c42d60728.pdfIn PDF document text
    • http://atlassian.implementation.collectivehealth.com/uploads/1/3/0/7/130738633/ab90f2a1a4d700.pdfIn PDF document text
    • http://amysbargainoutlet.com/uploads/1/3/1/3/131383942/tilevi.pdfIn PDF document text
    • http://colorr-colorr.com/uploads/1/3/0/7/130776085/refarafaz.pdfIn PDF document text
    • http://dds-staffing.com/uploads/1/3/0/5/130540402/fa545cb.pdfIn PDF document text
    • http://goldenbeachcafe.com/uploads/1/3/0/2/130272478/funebasediwadukodano.pdfIn PDF document text
    • http://mta-sts.email-mx.weallwantlove.com/uploads/1/3/0/9/130969974/bebexa.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 2

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_off00007f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4B 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_01_sfnt_off000087d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D7 10864 bytes
SHA-256: 74e8cf5546d4e47e4387afd7361722a3956c0cb3bfdd2ed0a28263bb83db2a2b

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