Malicious PDF — malware analysis report

Static analysis result for SHA-256 10466c9e0b603f06…

MALICIOUS

PDF

68.8 KB Created: 2021-01-13 13:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 44acc0599240510b3d7e7b39788814f7 SHA-1: 83d61633eebb5d303828b430851858fa2e558009 SHA-256: 10466c9e0b603f06d3671ac0e4e032c7da356c673b5595a4d9f2d38884c30817
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, directing to potentially malicious or SEO-manipulated content. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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://traffmen.ru/wb?keyword=pancake%20maker%20electric%20argos In PDF document text
    • https://wijuzibodeba.weebly.com/uploads/1/3/0/7/130738798/fupalugu_vakupobamomeg.pdfIn PDF document text
    • https://riguzegadediva.weebly.com/uploads/1/3/5/3/135314075/8044839.pdfIn PDF document text
    • https://sesizapilutib.weebly.com/uploads/1/3/4/2/134266568/lajosuvizopeko.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/49256585318.pdfIn PDF document text
    • https://fabupegux.weebly.com/uploads/1/3/4/6/134689396/45ec7cbab5.pdfIn PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/kofemera_nutikaxepuzawal_nunuvorisix_divawufubenu.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/gcnjcL5/38581510891.pdfIn PDF document text
    • https://cdn.sqhk.co/godanalumado/iQfhgtC/36364518513.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/dorobukasawituw/girl_power_quotes_for_teens.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/piano_sheet_music_in_my_life_beatles.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/lopigukiguge.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/46590345750.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/kokex.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_off0000d088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD088 5184 bytes
SHA-256: 454e21c3e3e8cd9a39d7a3ce76be38704709cde5e8ca255a4b3b067aaed50011
font_01_sfnt_off0000e219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE219 10772 bytes
SHA-256: 315185946b71b053a798d0469619d02f96d9be3a8c1aa3ae705c3a55147cca80

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