Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffca58de73a7944b…

MALICIOUS

PDF

85.3 KB Created: 2021-04-04 13:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04333d7c443cf21349dd04a4f7e94340 SHA-1: 243469d85b970c83db9b7365aaffad285d46078b SHA-256: ffca58de73a7944b2d573c5c707aeb8da8bc8f46fa3ff70eec1922eed0ed9cac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to PDF files hosted on services like Weebly, suggesting a link farm or redirection mechanism. The primary URL, 'https://jumiwimov.ru/aws?utm_term=iphone+5c+price+in+philippines', indicates a lure related to product pricing, likely for phishing or scam purposes. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://jumiwimov.ru/aws?utm_term=iphone+5c+price+in+philippines
    • https://xaviguvugunaji.weebly.com/uploads/1/3/5/3/135313722/4726491.pdf
    • https://cdn-cms.f-static.net/uploads/4404299/normal_604db7edd0677.pdf
    • https://nimivisedasefu.weebly.com/uploads/1/3/1/0/131070972/1563266.pdf
    • https://cdn-cms.f-static.net/uploads/4412757/normal_60318c413b8ea.pdf
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/b869ea8a82.pdf
    • https://fitinunajixir.weebly.com/uploads/1/3/1/6/131637477/sepupubose.pdf
    • https://cdn.sqhk.co/nigalasiline/Ihi1ibs/8757118368.pdf
    • https://cdn.sqhk.co/kelopifagisu/iT0Gjbn/40471932683.pdf
    • https://cdn-cms.f-static.net/uploads/4487206/normal_6033a6500c80d.pdf
    • https://cdn-cms.f-static.net/uploads/4449781/normal_602236e7593b8.pdf
    • https://cdn-cms.f-static.net/uploads/4412606/normal_601e71fdcc6d8.pdf
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60174f466eb9f.pdf
    • https://static.s123-cdn-static.com/uploads/4388611/normal_600577a4053ff.pdf
    • https://cdn.sqhk.co/pejinijew/e8fgilo/tickle_pink_inn_promo_code.pdf
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/2158006.pdf
    • https://mudujisobugabe.weebly.com/uploads/1/3/4/5/134511382/fuwusupa.pdf
    • https://cdn.sqhk.co/votezevon/jcggxje/pet_pop_art_portraits.pdf
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/dajofataborixilikil.pdf
    • https://static.s123-cdn-static.com/uploads/4487416/normal_5fe3b563935ef.pdf
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fd2fae718a16.pdf
    • https://cdn.sqhk.co/jeforije/dFghgcc/kid_rock_songs_northern_michigan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001054e.bin
5dda92219630425c3eb27701976a7b650b3a224e9bfb585194f1a7ac60b9aca8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1054E 4580 bytes
font_01_sfnt_off000114be.bin
7b6157fe7ee1394b1eb1771bf5d24e950d6e69d25fae195d45ac49e72f44eb6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x114BE 10828 bytes
font_02_sfnt_off000139c8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C8 4324 bytes