Malicious PDF — malware analysis report

Static analysis result for SHA-256 8532710825dbb4ee…

MALICIOUS

PDF

100.9 KB Created: 2021-05-23 13:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 075e3e1a9ee2b84151fb65d7add9a269 SHA-1: 0bf3b02edbd8876cf4abbf03f43fe11e37ee1486 SHA-256: 8532710825dbb4ee2dfaa6d480fa6fa7d29eec087c453c69013c7e3dd10aaf65
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous external links, with a primary URL pointing to a suspicious domain. The document's structure and the presence of many external links suggest an attempt to redirect users to potentially harmful websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://xajibur.ru/strik?utm_term=hollywood+horror+movies+in+hindi+dubbed+watch+online+dailymotion PDF link annotation
    • https://xazewipiw.weebly.com/uploads/1/3/4/7/134717961/xunaboxewaga-vadeduwe-xinufinijupag-jokomape.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366400/normal_6005635633dba.pdfIn PDF document text
    • https://wumikedamuzu.weebly.com/uploads/1/3/4/3/134324885/nomikol.pdfIn PDF document text
    • https://tuvukorop.weebly.com/uploads/1/3/1/8/131857527/282a6b8.pdfIn PDF document text
    • https://vowinerini.weebly.com/uploads/1/3/4/3/134385114/640717b7004634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5fe2768c9df2b.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/6609914.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/6434c28abcf.pdfIn PDF document text
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/kidomig.pdfIn PDF document text
    • https://favipipuwebex.weebly.com/uploads/1/3/5/3/135397367/7176161.pdfIn PDF document text
    • https://wofexajolevesi.weebly.com/uploads/1/3/5/3/135302186/kufugenatepepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_602b6558daec2.pdfIn PDF document text
    • https://pitatulepuz.weebly.com/uploads/1/3/2/3/132303378/reworumobaju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386593/normal_5fef639bdde88.pdfIn PDF document text
    • https://givudaxoj.weebly.com/uploads/1/3/4/4/134490896/fumagigivifilal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_6019c6880ea41.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/satutaxoxosofiwazi.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/losazidizixu_tinojapoj_wekononoru_kujodenukuti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/1366a3ef-3709-41a3-a3ed-eaccee207113/which_echo_show_is_best.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/epo_guidelines_selection_invention_inventive_step.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/2007_jeep_grand_cherokee_3.0_crd_review.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/grade_1_math_progress_report_comments.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/91106900125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f7525f-c3ba-4118-b4b3-1c0ca10d0ffa/chamberlain_garage_door_opener_remote_956ev_manual.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6B 5536 bytes
SHA-256: 82000d528d2b6f86325104f09d5ecbd69a73d8eb6c2f7e25be23b059983f01ef
font_01_sfnt_off00013221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13221 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00013d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D84 11344 bytes
SHA-256: a612c318af260e776564cab4863bd8a4e1f131bb407a7581a58d94819e9b3e88
font_03_sfnt_off000162f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162F8 10840 bytes
SHA-256: 6e2555712c146bc998b25b156563aac74d83756c26988f5a3824720085e88ce5