Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b519aac75ca4966…

MALICIOUS

PDF

103.0 KB Created: 2021-01-12 15:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9bac530df44704624e2ec8f63d281710 SHA-1: 986e5e7b3a435826036fb9b2130cdd5e52d2c147 SHA-256: 4b519aac75ca49667adc490dd6ce78a2903e87687d7d08154a02d29c0a00d59d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure at 'traffking.ru'. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host malicious links rather than present readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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=ain%2527+t+nobody+song In PDF document text
    • https://mibivatoroxup.weebly.com/uploads/1/3/4/7/134762409/7129148.pdfIn PDF document text
    • https://site-1177693.mozfiles.com/files/1177693/mechanical_assembly_drawing_exercises.pdfIn PDF document text
    • https://site-1177077.mozfiles.com/files/1177077/lofemu.pdfIn PDF document text
    • https://gekowodi.weebly.com/uploads/1/3/5/3/135321574/922a592d8.pdfIn PDF document text
    • https://legopaxazomunan.weebly.com/uploads/1/3/5/3/135396831/eb8bf8312a0c8.pdfIn PDF document text
    • https://site-1178372.mozfiles.com/files/1178372/elementary_chess_tactics_1.pdfIn PDF document text
    • https://lazezareb.weebly.com/uploads/1/3/4/3/134311903/3054043.pdfIn PDF document text
    • https://cdn.sqhk.co/lerutefo/gfjcvxh/street_bike_desktop_hd_wallpapers.pdfIn PDF document text
    • https://site-1174654.mozfiles.com/files/1174654/12025098610.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/dgfgg0z/vefejeseforisufajazuvezaj.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/bisiku/sfp-_10g-_sr-_s_cisco_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/adobe_photoshop_fix_apk_mirror.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/18816189592.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D14 4920 bytes
SHA-256: 72f17aae32dd0a27e662816aef1582927eb9b747f03ba6788decf57e1ea4be0d
font_01_sfnt_off00014df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF4 14280 bytes
SHA-256: d03293b4d992a56d2789fbc1162bbc4f3a5ee73acb5c57f3b55aba2a16e13ae3
font_02_sfnt_off000179e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179E8 16124 bytes
SHA-256: aab9e4ec44d5221ca7b3e03a3a492c22cb1467b7cbc3253beb5d472f44c0abb6

Open this report in the interactive analyzer, or submit your own file for analysis.