Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7cf4de28f2cef6…

MALICIOUS

PDF

76.4 KB Created: 2021-01-06 20:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8aa7d118dd570331b18897bdd3647382 SHA-1: 2a365378f92e3fa01be4a2f726e56bec6d6ee13e SHA-256: 0a7cf4de28f2cef6cf508d36f257676ba4343fcdc066cb5bc5e9809562218c42
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://gettraff.ru/aws?utm_term=caverna+de+plat%25C3%25A3o+pdf'. This suggests the document is designed to redirect users to potentially harmful content or to facilitate SEO spam. No scripts were extracted, but the presence of numerous links points towards a phishing or malicious redirection attack vector.

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://gettraff.ru/aws?utm_term=caverna+de+plat%25C3%25A3o+pdf In PDF document text
    • https://cdn.sqhk.co/weteroliwo/Y8jfjiK/84848374693.pdfIn PDF document text
    • https://nipoxumafoji.weebly.com/uploads/1/3/4/7/134717148/tugokeji-xiranupuw-dawoz-diruponobelol.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedepobe/utHAkje/57353981021.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/rufesununaz_dawufabepa_tazejoz.pdfIn PDF document text
    • https://cdn.sqhk.co/punenekebi/hgfgeFS/easy_cash_wallet_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuguxovim/jbVahii/dubej.pdfIn PDF document text
    • https://cdn.sqhk.co/begorukenega/NLZPiic/26688402611.pdfIn PDF document text
    • https://cdn.sqhk.co/dukapudubi/YbxmQw4/9705205067.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/cOjajeK/66039630610.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/pokixovuxik/8039704590.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/jeritegetogubamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2509b4-ba52-456c-9836-26d16cbaedf1/infiland_bluetooth_keyboard_pairing_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/commando_2_trailer_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/guia_ceneval_acuerdo_286_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739b187f-920b-4833-949d-e1c3f7a14b6b/83379469533.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/thomas_calculus_11th_edition_textbook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/ultra_hd_hollywood_movies_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/dogazunegeme.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_off0000ec35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC35 5140 bytes
SHA-256: 4ad36419a260b0300f4330fc5f945f7848f852df1aff1fe32eb70c4768d20ddf
font_01_sfnt_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 12372 bytes
SHA-256: 712bdf1225fd36ba41def156d686a2c3795316f82ebf63bd01e98d141b55dbb7

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