Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e5e07cee177449…

MALICIOUS

PDF

71.7 KB Created: 2021-01-17 11:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9e25b6692f6470b61fb30475449e64be SHA-1: f406e3be258d3dfa25bfab29c6d4d43cc489bf2b SHA-256: c0e5e07cee17744978a898c16ccaef4547b7a08bde1feeb5fb990f43542e4194
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure (https://traffking.ru/aws?utm_term=3gp+bodybuilding+motivation+video). The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, further supporting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/aws?utm_term=3gp+bodybuilding+motivation+video In PDF document text
    • https://site-1166752.mozfiles.com/files/1166752/linuwejudodapetabo.pdfIn PDF document text
    • https://cdn.sqhk.co/nudabesawi/fggicV0/daduxim.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/97Qgdjh/sneaker_wallpaper_hd.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lukuxaluk.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/qdCxAge/traducir_latigo_en_ingles.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/ihXm1St/portable_picnic_table_and_chairs.pdfIn PDF document text
    • https://site-1244768.mozfiles.com/files/1244768/6261825866.pdfIn PDF document text
    • https://site-1167973.mozfiles.com/files/1167973/draw_50_baby_animals.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/hinAggk/95227542407.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/iDxIjf1/zijedoto.pdfIn PDF document text
    • https://cdn.sqhk.co/kagawupatow/exBDrRK/wepido.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutulig.epizy.com/the_avengers_mobile_game_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/hickory_tree_identification_tennessee.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/font_awesome_icons_code_list_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/fegifu.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/mathematical_modeling_worksheet.pdfIn PDF document text
    • http://supetok.rf.gd/fractions_worksheets_ks1_halves_and_quarters.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_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 5376 bytes
SHA-256: d2c86d012d3dc9de169aff8172ae6dcd8739bcb6263bba63c075001678f07888
font_01_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 10980 bytes
SHA-256: 02f81bccb00272c77add41ea0b2c70f49a10fed37779fb3f5b2fa6b0fd4528f8

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