Malicious PDF — malware analysis report

Static analysis result for SHA-256 219031f4c9fac2e0…

MALICIOUS

PDF

82.8 KB Created: 2021-03-11 23:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 872c91e5ae5c6f4a482c3fb95d4bfbe0 SHA-1: 230b65b4b0be268ed14320760e2272913731e6c5 SHA-256: 219031f4c9fac2e02ea52f1fb8c0c758f7af5ca6e1b8be670df087d9c1e6c3d2
186 Risk Score

Malware Insights

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

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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://dugedepap.ru/123?utm_term=2018+mustang+gt+automatic+vs+manual PDF link annotation
    • http://lefibipefazefep.mypressonline.com/craftsman_625_series_190cc_lawn_mower_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/bulenupulabo/0Ujbiey/creative_wood_craft_ideas.pdfIn PDF document text
    • https://kujugozu.weebly.com/uploads/1/3/4/6/134660126/fc1414c.pdfIn PDF document text
    • https://mozalotajevel.weebly.com/uploads/1/3/2/6/132682758/6d7e5e.pdfIn PDF document text
    • https://buvurujexo.weebly.com/uploads/1/3/6/0/136082217/zukidotula_xasabevome_nalufilapekusi.pdfIn PDF document text
    • https://kesiwupi.weebly.com/uploads/1/3/1/4/131407351/kitusanasezizov-bugavasulezusib-xipif.pdfIn PDF document text
    • http://tivewuba.iblogger.org/alien_3_william_gibson_script.pdfIn PDF document text
    • http://bopugafuwu.scienceontheweb.net/97454664047.pdfIn PDF document text
    • https://roxobirunuj.weebly.com/uploads/1/3/4/0/134096027/8862238.pdfIn PDF document text
    • https://petozuxelilaf.weebly.com/uploads/1/3/4/2/134265439/518525.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/ejfieia/28017091984.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/KgeT2pe/90674261718.pdfIn PDF document text
    • https://fufuwotasivixi.weebly.com/uploads/1/3/5/9/135966690/soposazesapexiga.pdfIn PDF document text
    • http://pufemebulod.22web.org/59412628866.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/bd3WguX/3_tamil_movie_background_music_ringtones.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/70830934931.pdfIn 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
    • http://fobonerenajob.epizy.com/how_to_draw_better_hands.pdfIn PDF document text
    • http://fuxezol.rf.gd/bang_bang_full_movie_480p_bolly4u.pdfIn PDF document text
    • http://rozatibex.rf.gd/tazawivelevuvegisadoweku.pdfIn PDF document text
    • http://zupupizejegujun.epizy.com/28197047086.pdfIn PDF document text
    • http://mejojaka.epizy.com/abu_garcia_black_max.pdfIn PDF document text
    • http://wiwilevo.epizy.com/tojukikufolororuwomoxiz.pdfIn PDF document text
    • http://kewoxorewozox.rf.gd/lugoropulunawadanupemewuk.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF606 5272 bytes
SHA-256: 3976f635626f7a3d03722505970b84db90aca2ed04c45c0688ae7715c0149bd5
font_01_sfnt_off000107d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D2 10920 bytes
SHA-256: 54cba9ab0e112dd140577c9fb24695205240688d1fc0999765a1bb02848e87db
font_02_sfnt_off00012d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34