Malicious PDF — malware analysis report

Static analysis result for SHA-256 216365c536c1b487…

MALICIOUS

PDF

66.7 KB Created: 2020-12-24 11:08:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41257316452eeac6416d7dbb3b3dd545 SHA-1: 572e119be8523f47b63af3be980a40058c2b4a00 SHA-256: 216365c536c1b487eb8e80a6c5fc1fa336bb30406137d761417748236fced0c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to Weebly and S3-hosted PDFs, indicative of a link farm or phishing operation. ClamAV and ML classifiers strongly suggest malicious intent, specifically classifying it as a phishing trojan. The embedded URLs, such as 'https://traffset.ru/123?utm_term=young+life+talk+illustrations', are likely used to redirect victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=young+life+talk+illustrations
    • https://wadonado.weebly.com/uploads/1/3/4/6/134677460/jamex_riwerowuvupusor_xijegak_fumumi.pdf
    • https://cdn.sqhk.co/sejujona/oZcggjb/farm_master_panels.pdf
    • https://cdn.sqhk.co/dupeguwova/ifGjcjf/long_nails_natural_instagram.pdf
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/558a835e3a6abc2.pdf
    • https://zuxizakubapepo.weebly.com/uploads/1/3/4/3/134317428/2311864.pdf
    • https://rutebamem.weebly.com/uploads/1/3/4/8/134862863/nuloguzeziduf.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/e4985a4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xufujofaleki/referencing_an_online_report_harvard_style.pdf
    • https://uploads.strikinglycdn.com/files/100884fe-7b62-41e4-89d7-fde9fd7268ef/dudomubefimoxuwiridexu.pdf
    • https://s3.amazonaws.com/dujepav/comparing_two_excel_sheets_vba.pdf
    • https://s3.amazonaws.com/wikurixobelu/tiboziganadagekogazu.pdf
    • https://s3.amazonaws.com/pozokimepe/sum_function_in_ms_access_report.pdf
    • https://s3.amazonaws.com/tidigudetefumof/general_knowledge_questions_and_answers.pdf
    • https://s3.amazonaws.com/bejeseja/47358613896.pdf
    • https://s3.amazonaws.com/metubevozisul/paper_sheet_sizes_australia.pdf
    • https://uploads.strikinglycdn.com/files/faf6cc51-b36a-440a-aa8c-1ce77e223549/distribucion_de_frecuencias_acumulad.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9fa.bin
04be3c1b8b7bebba12ade81ff25fff8eaf619d5a62c18c92a58e08241a56f445
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FA 4960 bytes
font_01_sfnt_off0000daf0.bin
31e1c996e1aa2e8cdcbf47348d22ef81a9c93ec26d7fedc181b55ee30cbcfcff
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF0 10248 bytes