Malicious PDF — malware analysis report

Static analysis result for SHA-256 687eee4efed13015…

MALICIOUS

PDF

132.7 KB Created: 2021-01-22 16:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4e30d2e11561a08733349b10ff0a63f1 SHA-1: d0e3bc1a5178312157a12ae0471e725d7911b732 SHA-256: 687eee4efed13015a204930df22d719410cc3a187595744ecba42f7be5f6c495
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to numerous disposable hosting sites, with one identified URL being https://traffine.ru/123?utm_term=c.m.+stunich+orientation. This pattern is commonly used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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://traffine.ru/123?utm_term=c.m.+stunich+orientation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fd08eb31cbc8.pdfIn PDF document text
    • https://dufeduvu.weebly.com/uploads/1/3/4/4/134481569/3217030.pdfIn PDF document text
    • https://site-1084247.mozfiles.com/files/1084247/pixel_pirates_eso.pdfIn PDF document text
    • https://cdn.sqhk.co/razupojoja/I9gjkhi/d_d_forgotten_realms_sword_coast_map.pdfIn PDF document text
    • https://xovawezovikax.weebly.com/uploads/1/3/0/9/130969403/7af864e1561d.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/gggkqsd/weed_eater_repair_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5fe0ac0928a44.pdfIn PDF document text
    • https://site-1178097.mozfiles.com/files/1178097/beholder_5e_sheet.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/twin_bed_sheets_on_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jgh2giH/spinning_connect_your_ride.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477655/normal_5feed7eddb9a5.pdfIn PDF document text
    • https://xemexavowud.weebly.com/uploads/1/3/1/8/131857479/nelokerewemoloxiko.pdfIn PDF document text
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/zapaminapilijov.pdfIn PDF document text
    • https://cdn.sqhk.co/foseziwate/cigBvhf/dapenekuxesugopoluzo.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/elvPgeU/99389794287.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/badodemebo/xajugozogunumofenotisef.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/2019_buick_regal_tourx_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/vibigedezixesatabi.pdfIn PDF document text
    • http://fedukiz.epizy.com/broadsheet_melbourne_best_bars.pdfIn PDF document text
    • http://jonegukum.epizy.com/59768626854.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/accident_incident_report_form_qld.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

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18721 3752 bytes
SHA-256: 91f6d3fdda1ea0599568886cd09dc3e70157df600c5411fe3d41cd33d13fdd39
font_01_sfnt_off0001945a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1945A 4944 bytes
SHA-256: d1e8f8c161b256b2b3533ee824c48766e90899eb12e158747ead48a09836ce02
font_02_sfnt_off0001a4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4F8 5160 bytes
SHA-256: 56f2682480416de168bffe5feeba87f560686707c4a4ce3dee5af9ae8f827f58
font_03_sfnt_off0001b73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B73F 12388 bytes
SHA-256: 4657213b38e182862d66147db3a1e70c2186e345bb68f81dba37a0a2b0031c42
font_04_sfnt_off0001e0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0D4 17556 bytes
SHA-256: bb89a03da6737ee517bb5d82931dca22a510d855a87e85edf5a874645eec9a74
font_05_sfnt_off0001fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FAD7 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df