Malicious PDF — malware analysis report

Static analysis result for SHA-256 345e20aac14c3fb2…

MALICIOUS

PDF

77.3 KB Created: 2021-01-10 00:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: fbc25ac17a93da2b77c68fb9be9f4435 SHA-1: 05024f5874cf0934ff5d7be3d8a40f945d93f152 SHA-256: 345e20aac14c3fb291ace4dc8330aa2461c2408ee7f3e2fb94a0a5fd4c7f6c0d
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution lure. It contains a large number of embedded URLs, forming a link farm, with at least one pointing to known malicious redirector infrastructure. The document body appears to be corrupted or obfuscated, preventing a clear understanding of its specific pretext, but the presence of numerous external links strongly suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/aws?utm_term=alberto+torresi+formal+shoes+india In PDF document text
    • https://cdn.sqhk.co/bitaxukezor/lEPhcib/tangled_up_in_blue_jerry_garcia.pdfIn PDF document text
    • https://botebagi.weebly.com/uploads/1/3/4/8/134870763/zigeturipajomij_nigogoniz_judilamajozaviz.pdfIn PDF document text
    • https://cdn.sqhk.co/zofagopipowi/gjFicjI/33486216308.pdfIn PDF document text
    • https://riwobasafogad.weebly.com/uploads/1/3/3/9/133999818/49d5b77.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/zifiih7/88619173259.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/fgeA47I/candy_blast_mania_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/HsLiehd/mijidexev.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/gibaxabiwifedakoro.pdfIn PDF document text
    • https://wenibowefopari.weebly.com/uploads/1/3/0/8/130814001/5765062.pdfIn PDF document text
    • https://gefaturulabi.weebly.com/uploads/1/3/4/4/134487578/gajakidevuragusoz.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/bNOjgdc/54631109550.pdfIn PDF document text
    • https://rasisepuwefu.weebly.com/uploads/1/3/4/6/134678142/4a6e746782.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/egfkSql/real_bike_racing_game_download_for_android.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
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE0 5064 bytes
SHA-256: 30a30278b955af7edf691e05ff77864b6c3d7660a3caf6a882c7adc0da8cc74c
font_01_sfnt_off0000dede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDE 11084 bytes
SHA-256: 172b54f4d277c8367cb149ed288cb5c3901c1bb98774cce206a87cdfa5aaf1e6
font_02_sfnt_off000104ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EC 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_03_sfnt_off00011a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A03 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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