Malicious PDF — malware analysis report

Static analysis result for SHA-256 172d44dd34d009e5…

MALICIOUS

PDF

62.3 KB Created: 2020-11-13 07:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 68682808763647352a092a2cb173c2e8 SHA-1: 17a5c41a0f6b706c1d890d6af0ea35ad465f21b4 SHA-256: 172d44dd34d009e5e5bd5f2179aaf1cf8f93d7c4c77aaf0eea23dbf0796d90c9
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a sale, aiming to trick users into clicking malicious links. The presence of a malicious redirector and the sheer volume of links indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=alexander+mcqueen+platform+trainers+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4472221/normal_5fa83750bb6f1.pdfIn PDF document text
    • https://pasuzexogisinib.weebly.com/uploads/1/3/4/2/134266431/nomowiwafodul-midivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_5f8d50e917f3f.pdfIn PDF document text
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/ee4ceff2b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mutirexa/etl_project_estimation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/learn_english_speaking_course.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/ifile_apk_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/lenovekekazuba.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/business_card_background_design_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/current_global_issues_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/barron_s_sat_subject_test_chemistry_13th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/destined_to_reign_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/14736559230.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/headway_academic_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/gakugiwonuxomiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3754d20-46b3-42bb-8048-e3c3100d1435/gabagipekexevekuril.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/visual_spanish-_english_bilingual_dictionary.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_off0000b543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB543 5484 bytes
SHA-256: ed82663c8662fa94a492113266cc2d36b2458d47332970e93bccd1c7ccfccb2c
font_01_sfnt_off0000c7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DB 11056 bytes
SHA-256: 24b67ebb265a5b8e452413781da645a6e63f7ad086d844be7e938da713b8daf2

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