Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3d250288dca299…

MALICIOUS

PDF

42.2 KB Created: 2020-03-17 15:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2094199a17309f4103413457e26d053a SHA-1: a87ab1c3246bce3c8525c1e0f4c2f8016a30ad6b SHA-256: cc3d250288dca2991d6648c7dc3eb30890fbd6a035440308ab163e44fbc98de8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF document was flagged by an ML classifier as malicious. It contains a large number of external links, many of which are to PDF files with numeric slugs, indicating a potential link farm or SEO manipulation tactic. One of the embedded URIs points to 'flyceclothing.com'. The document body is largely unreadable due to encoding issues, but the presence of numerous external links is the primary indicator of malicious intent.

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://flyceclothing.com/uploads/1/3/0/6/130620217/130620217.html#conversion+de+pie+cubico+a+litros
    • http://www.boneandstone.com.au/uploads/1/3/0/8/130813115/f7e6208.pdf
    • http://natural-olive-oil-soap.net/uploads/1/3/0/5/130551402/9750430.pdf
    • http://mycoachapril.org/uploads/1/3/0/6/130621373/zegezoj_dinevewotevav_doxebiw.pdf
    • http://ftp.annabelgreen.com/uploads/1/3/0/3/130379311/b741c69ea5.pdf
    • http://domiciwk.com/uploads/1/3/0/5/130589402/9811590.pdf
    • http://acercandotusalud.com/uploads/1/3/0/4/130488968/worarapipip.pdf
    • http://www.behaviorbridgecoach.com/uploads/1/3/0/7/130775045/6000468.pdf
    • http://wilbrahamantiques.com/uploads/1/3/0/3/130379114/vedixut_tilederedube_vanaraxozitalo_xodibesewu.pdf
    • http://jinzanyulechengmianfeikaihu.br3h.com/uploads/1/3/0/2/130272483/jigaxaranosob.pdf
    • http://petahuk.store/uploads/1/3/0/7/130740256/zozofodalov-wavikarikosoba.pdf
    • http://transitionscoachingservices.ca/uploads/1/3/0/5/130588778/fujowifipozagifi.pdf
    • http://alishatodd.com/uploads/1/3/0/7/130738852/97ed836.pdf
    • http://thesocialhouse.agency/uploads/1/3/0/7/130739143/4513857.pdf
    • http://phdentists.com/uploads/1/3/0/6/130605452/pitamozoro_gekovesuwanoze_zakudibati_gokofadalisu.pdf
    • http://pansyandivy.com/uploads/1/3/0/3/130379482/7823328.pdf
    • http://jfproductionsvideo.com/uploads/1/3/0/5/130545189/6ac9b419.pdf
    • http://reimaginingwellness.com/uploads/1/3/0/6/130604758/0dd64de8a.pdf
    • http://brittany-paris.net/uploads/1/3/0/6/130604556/pijova_tobebep_fokuvap.pdf
    • http://www.pearl-and-grace-boutique.com/uploads/1/3/0/5/130588207/bodojegib.pdf
    • http://www.hopesilverado.com/uploads/1/3/0/5/130540437/5889896.pdf
    • http://castleonchurch.com/uploads/1/3/0/5/130589123/wawiloxovafa.pdf
    • http://jeffrobinsonlcsw.com/uploads/1/3/0/3/130313213/mixol_gojugipu_kigor_luvasawi.pdf
    • http://castleonchurch.com/uploads/1/3/0/5/130589123/wawilo
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000731c.bin
79388d04ce4db4fbafa348a4f3859bd6e8689f6120ddacfef773b7cbf2e5eab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 7524 bytes
font_01_sfnt_off00008f58.bin
e2a609504f31aba74360c8f97aead3d8f97c76e888a653261413c8bef59e3205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F58 2884 bytes

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