Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5f49cc6aeaceba…

MALICIOUS

PDF

68.7 KB Created: 2021-05-02 18:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 213164e154d48669168e171cc36fcdc4 SHA-1: a55aa3824eafd6137ee83a085a38d01aaa49fc43 SHA-256: bc5f49cc6aeacebac4854c7f213c754c7deb95e7f78f8295c051fe099c22be6b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or redirectors, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=usps+priority+mail+rates+by+zip+code PDF link annotation
    • https://cdn.sqhk.co/rudugebakivo/Qxib4gj/mob_xp_farm_minecraft_1._15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_6028240f4d827.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/V62wZsC/93223962834.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489033/normal_5fef5c67b4e2c.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/dXehd3B/59267513053.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://badowivisoruk.rf.gd/does_arbys_have_5_for_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7ad4c0-277c-4797-9eea-55ee0ffdc4d9/daisy_powerline_880_kit_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a7bf78-1eb9-46cf-a93e-7a2492c5547b/33140968850.pdfIn PDF document text
    • http://xiramegakasivi.epizy.com/86344850674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb213a4d-754e-4496-a2da-e709c531f22b/edenpure_heater_replacement_parts.pdfIn PDF document text
    • http://kutijizon.epizy.com/76468090574.pdfIn PDF document text
    • http://gejajute.epizy.com/ielts_test_with_answers.pdfIn PDF document text
    • http://luwawabegopit.rf.gd/is_the_crown_season_2_accurate.pdfIn PDF document text
    • http://rifunasi.epizy.com/pajiguxomuvufozegedozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/055e90e4-bf55-49a9-9ad1-ab279ccc5045/american_heritage_childrens_dictionary.pdfIn PDF document text
    • http://zegaruso.rf.gd/vazarimazezekapadalemoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a15b5e8-83a0-4ad1-9d6d-f31ec3429af9/sony_ht_ct150.pdfIn PDF document text
    • http://kinapemib.rf.gd/33906768963.pdfIn PDF document text
    • http://wulumesa.epizy.com/88881823126.pdfIn PDF document text
    • http://lazumibuwa.rf.gd/xeviburewo.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_off0000ce5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5E 5500 bytes
SHA-256: 07e6c84f622a9936f5e41a03bab48b2b0ca664ef204b877093c4fcae3c6d8211
font_01_sfnt_off0000e102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE102 10740 bytes
SHA-256: 2a9b3c47b8f91f4d9da9a2d71453f65ec2a85da9d4347d769c629b4fff743525

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