Malicious PDF — malware analysis report

Static analysis result for SHA-256 212939841918d62c…

MALICIOUS

PDF

68.2 KB Created: 2020-12-15 20:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7ac65abb091e3c15b23af2998e3746f8 SHA-1: d083c8e320becac91cbeb9f8640f8add686ea205 SHA-256: 212939841918d62cdd4420ea709c438919e2aba3343fb836a50ca0e7feeca467
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF link farm'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or SEO spam. The presence of embedded URLs and the nature of the heuristics suggest an attempt to direct users to malicious or spam content, potentially using JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=black+and+decker+20v+lithium+weed+eater+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5fb8801b3594a.pdfIn PDF document text
    • https://vupudotexim.weebly.com/uploads/1/3/4/8/134884591/fudixib_mubegepusuko_zugumefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5fd1558153452.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/703e5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5f9189280a172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5f8fd13a38fb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdff729ee0f32b8719fd3d/1606287218922/moussu_picchu_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54e7f5687f52b6b9e5b2d/t/5fcfab057cc0b10a0adb8448/1607445254431/ufc_fight_night_smith_vs_clark_wiki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f24c403f5353fd95fd42/t/5fc43084f8cdb769c6681abc/1606692996907/integrated_rate_law_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/dajimufolajibodaxasaribo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11362403f5353fd96c027/t/5fcffd8f68e95c5e3d508aea/1607466387627/paxoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5841b753-05a2-4e24-ac9f-abec08c937ac/27733547657.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c8f51452f90b7fe4c8fc/t/5fc723cd7995075abddde39c/1606886351690/worlds_hardest_game_unblocked_hacked.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f73d1c8c741314321d77/t/5fc1ba81fa04221c715fdafa/1606531717078/boom_beach_mod_apk_offline.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_off0000cc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1F 5540 bytes
SHA-256: 8e6723cb39a244da9e5ac524fa46e76bee84536f8c014e3a8a25f593905f96bb
font_01_sfnt_off0000dedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDD 11160 bytes
SHA-256: 677a38cab3e9ed37ada943f25b8a56a57b8cd0ba069483faf5ab77b194fc8673

Open this report in the interactive analyzer, or submit your own file for analysis.