Malicious PDF — malware analysis report

Static analysis result for SHA-256 1308b13999f6bada…

MALICIOUS

PDF

80.7 KB Created: 2020-12-15 19:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ceb2de79d808852355014f8235fd78e1 SHA-1: 39df311893242b3d64389cc9f822e6217a1ce7f0 SHA-256: 1308b13999f6bada1e6a6535b5ebf67180dd5ac3716e34bccf84494a0af5685f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://traffking.ru/strik?utm_term=anna+university+transcripts+password PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419642/normal_5f9ca7c863069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5fa191ea33b7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_5faab8a7c8748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5fa81f265ffa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f883c2485fdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464707/normal_5fc8af3c0abca.pdfIn PDF document text
    • https://jategolotigani.weebly.com/uploads/1/3/4/8/134882723/nuxasogete-rejezatamelomu-sonikezemuviw-fadupitabazapom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fa8564dd7dd9.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/5fc519b12bbd74065821ad2f/t/5fc75d67a907d7439cd96a35/1606901095491/zippo_pocket_warmer_nz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1d6f2a183c06f5a9a1fd/1606229359970/mitosis_internet_lesson_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a41f3d-a694-4492-9c64-108a714609ec/list_of_major_world_history_events.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e5d160-6878-4d51-a1dc-6596e84ffaa1/40591227242.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf56333c02f22b9d043b6b/1606374970196/76711437195.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/wirikozexatenolopilubom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51a50be9b69395125fab5/t/5fcf8a19ba7003536eaee29b/1607436826492/worm_jim_game_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc31e63a97599144e5e7edc/1606622819885/fgo_jp_apk_update.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 5276 bytes
SHA-256: ff9adf21fcda2794e96ce08780cd59f0dbddeb96ae8fe69678622641e004c120
font_01_sfnt_off0000fa34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA34 11304 bytes
SHA-256: 36ae3f3155455b716782c3d6bf45e5c5eee34b9fd347fc26fd6bb8497f34b3b1
font_02_sfnt_off000120cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CD 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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