Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3212ea4f4c9ef2c…

MALICIOUS

PDF

103.2 KB Created: 2020-12-21 05:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 70d34e5dc108f681647c59883b17367f SHA-1: b004c18d81a69779369dc73ace2d69ef8902ff31 SHA-256: d3212ea4f4c9ef2ce07ae26ed2aaebb321c1ce41b49cf6f3b8eb8a32c8f8ef1c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a high concentration on disposable hosting, and a specific heuristic indicates it's a link farm. The presence of external URIs like https://traffking.ru/strik suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/strik?utm_term=dwayne+haskins+jr+contract PDF link annotation
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/8018732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5f8d297a6e426.pdfIn PDF document text
    • https://zoradelageruwol.weebly.com/uploads/1/3/4/5/134591251/wasap.pdfIn PDF document text
    • https://xawajedub.weebly.com/uploads/1/3/4/8/134886715/3f16e9fd2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5f9e079a89de9.pdfIn PDF document text
    • https://vadukoku.weebly.com/uploads/1/3/4/7/134707593/0c46bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475987/normal_5fcbcc997584d.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
    • https://s3.amazonaws.com/wunojipu/what_are_5_skills_scientist_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4385cc76-c56c-4f39-81ab-fa73945d5fec/ys_91_sr_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f6bd5e8e827d42a7e1ed/t/5fce5d613ff10115402441f0/1607359841762/stickman_archer_fight_multiplayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a53730b3-d4ad-4ccc-9bdf-99da8c939e44/spanish_american_war_apush_leq.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD496 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000e459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE459 4204 bytes
SHA-256: fddf44a81b8d02397b8c345a0edcc28c5e97eef29abbc3afd0f92644bef7669f
font_02_sfnt_off0000f329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 4976 bytes
SHA-256: 089a7dab7b1f3c2dbd9294e0514b16f08016868f5daf886f848329bdc9fc8a74
font_03_sfnt_off0001040d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040D 13552 bytes
SHA-256: 778053040fa3ac461dfc534351c1d685fb909fc10e62659e3265eb3a11d8c036
font_04_sfnt_off00012c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C41 11204 bytes
SHA-256: f3e6017cc4712c6951295ba39270976f8b6d2f2fd645c71d3ae4415679b9e106
font_05_sfnt_off000152c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152C5 16468 bytes
SHA-256: f62b7d1d0abdeb113abca66044ee8356b0759c066a1a003ae6df586431e4fbaa
font_06_sfnt_off00016907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16907 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_07_sfnt_off000176ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176BA 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df
font_08_sfnt_off00017dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DFE 6148 bytes
SHA-256: 977388c69efa3d8ba135356ce6c250ab8be674577d2ef836b7706b7f5040cc2e