Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0fdd1297b8d94dd…

MALICIOUS

PDF

96.7 KB Created: 2021-05-02 10:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0f8a433edc5917eeaa5e051c73dff943 SHA-1: c0aa8276f15fdcddddd6e6d6d891155bee8ed567 SHA-256: c0fdd1297b8d94dd68fe7ab8806f2724a15f66bb327a9378e22409bc3f63dc80
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/strik?utm_term=sunbeam+bread+maker+5833 PDF link annotation
    • https://zedurobarudavur.weebly.com/uploads/1/3/4/0/134018347/jesunibe.pdfIn PDF document text
    • http://gumovuf.22web.org/11577694601.pdfIn PDF document text
    • http://tevfikyuce.xyz/rubemifejakaferemafedu4iv.pdfIn PDF document text
    • http://vibigalobonewil.iblogger.org/96903209023.pdfIn PDF document text
    • https://cdn.sqhk.co/rogudokives/fges0GL/glitch_lab_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/Igj3jcO/62226120044.pdfIn PDF document text
    • http://globalsafegroup.com/xesuzugeresatureserexinab4h4u0.pdfIn PDF document text
    • http://trysucre.pro/6319299865bxhvg.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/bXhhbOS/proper_answer_of_tell_me_about_yourself.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://worldworkbook.com/juluxekiwipavizidovazn1gx.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/5380895.pdfIn PDF document text
    • http://cafechorsu.ru/gubezinobu95xqp.pdfIn PDF document text
    • http://zesijesagevonot.22web.org/mekisefolukobuzobaxirux.pdfIn PDF document text
    • https://vigedinolig.weebly.com/uploads/1/3/1/3/131380992/rofago-gofemosopuwo-tedudoti.pdfIn PDF document text
    • https://pulisojoperun.weebly.com/uploads/1/3/4/4/134487891/9063407.pdfIn PDF document text
    • https://zutegikovepob.weebly.com/uploads/1/3/4/0/134017150/mudimovilibojejepuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/TifjdUK/disney_princess_my_fairytale_adventure_pc_game.pdfIn PDF document text
    • http://reduslimitalia.website/purezodajigowx2.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/189fcedb-2aed-4008-979e-c8c326b4c68f/53851633695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a7d9cc-e634-458c-ad02-6807dc4a9833/magigesavifomexomuba.pdfIn PDF document text
    • http://zifopodisinuri.rf.gd/85678733814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a523626c-0fc8-40a2-b548-ca3bc15e05ad/tl_wr841nd_configuration.pdfIn PDF document text
    • http://zividovapajawuv.epizy.com/14351477225.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000143da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x143DA 20444 bytes
SHA-256: 77fd3dcc6d870493541d6b5d7527c952b1c4799a54de2ad56590046f5b43e631
font_00_sfnt_off0001006f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006F 1720 bytes
SHA-256: f5c64edc22311ffcc51596fb3711a3940331fa3cdd1e216b58375e2f0d929f49
font_01_sfnt_off000108e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E1 5192 bytes
SHA-256: e9aecf410c57264123c1591ecc162b00ba8e2b619666894eb0ecfe50c01972e0
font_02_sfnt_off00011a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A56 12148 bytes
SHA-256: f4e397f1be0d384034993d62c01a1826eccb6d648df3e74facae961695652213
font_04_sfnt_off00016628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16628 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378