Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd08726359895f5…

MALICIOUS

PDF

165.7 KB Created: 2021-03-16 03:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: a5c9d3a83921adce1482af80133d0ac6 SHA-1: 56f99b55d81b483644523944d3009c7268b336a4 SHA-256: dbd08726359895f56891aef0029639a993e066e19cba4363b018eedf0824e629
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a pretext of an official decree to entice the user to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=decree+of+reflection PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407304/normal_601dc0421b11d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379723/normal_5fc7542114058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455396/normal_604a84ad19d3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451760/normal_60303201243d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_6027ac44233b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_604de606cf439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5fea3a3c3f6e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5fd7b446b8dca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_5fe500e9e31bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc17060e-6eb3-4f8d-af1a-3a05b7b0d55c/kutokuxofofireduxekad.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/multiple_meaning_words_worksheets_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb663f7-f6cc-4dab-8468-b35ec1488727/craftsman_snowblower_parts_edmonton.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/82116362518.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/boduguxinataforevekatoji.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/beachbody_on_demand_won_t_workouts.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/fegitetesopenetobefup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e149d28-214b-4567-bcb6-5db2874d8662/what_text_structure_is_used_in_this_passage_cause-effect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54204b14-1f50-4e1c-baec-1a467b0f221c/56884029136.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/lekitirarusegopeguj.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/algebra_and_trigonometry_6th_edition_pearson.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/roweguzapoje.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/57881453547.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/world_cup_fixtures_tv_guide_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/72478456667.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/38201833808.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24FD4 4488 bytes
SHA-256: cd4db97a73a57401ad33a7ba0e9fc8211775766a8ff17030d43bb79862b05c16
font_01_sfnt_off00025f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F2F 12008 bytes
SHA-256: 9c5656e5fa617f0bf5b82e056a851cb5af01dabc0b5a973173958a7b1f0610cd

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