Malicious PDF — malware analysis report

Static analysis result for SHA-256 a969bb6a2876797f…

MALICIOUS

PDF

78.7 KB Created: 2020-12-25 10:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 03bebd2929602d823c9a0eb45668d424 SHA-1: 095b8cdf84a657e3521b296b1a6a7ed8e1bfe7c7 SHA-256: a969bb6a2876797fcd4e6bcd280967ea2bcaded26cb95cc1952cf0b02e2fe962
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of many external links suggests a link farm or phishing attempt designed to drive traffic to malicious sites.

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
  • 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://cctraff.ru/aws?utm_term=future+fight+character+guide In PDF document text
    • https://cdn.sqhk.co/serojimo/Iig7hie/84637232792.pdfIn PDF document text
    • https://vafarisitoguv.weebly.com/uploads/1/3/0/8/130874489/fesozubo.pdfIn PDF document text
    • https://nafusifino.weebly.com/uploads/1/3/4/6/134615437/795280.pdfIn PDF document text
    • https://mowasedexalobir.weebly.com/uploads/1/3/4/7/134743102/8183587.pdfIn PDF document text
    • https://vidajubobulixi.weebly.com/uploads/1/3/4/6/134650234/1903972.pdfIn PDF document text
    • https://cdn.sqhk.co/pekebugus/GNyygcI/66367926801.pdfIn PDF document text
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/2326033.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fc35baa8-383c-4a24-a7bf-1e954344d2f6/sisters_of_the_yam.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/nejm_author_submission_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/bts_photoshoot_2018_love_yourself_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/my_games_4_girls_._com.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/wuxekifetesi.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/dolulumodegujof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f710623b-a302-447c-af1e-81255256f8b2/horse_sale_payment_plan_contract_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE54 4696 bytes
SHA-256: e1322f0ed9b9cf8fef16c1c1675b2e9145682e6348511e60e81d9c4e8eb7387c
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 9844 bytes
SHA-256: 61b17a327b3ade9884adaf57cc731b0afc51a3ce016613dd6c515a433b5c7259
font_02_sfnt_off00012019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12019 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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