Malicious PDF — malware analysis report

Static analysis result for SHA-256 a196d05a7b2b42f3…

MALICIOUS

PDF

75.8 KB Created: 2021-01-22 13:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9be165bb232424f96138f0b571772165 SHA-1: 764681da498558dd5e2ec1f73456134cd96f9a12 SHA-256: a196d05a7b2b42f3c0943ba711868404bd483e5344ca8884922bf4a5d7ba30de
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of multiple PDF_SEO_LINK_FARM heuristics further supports this, indicating the document's primary purpose is to redirect users to other sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://trafftec.ru/123?utm_term=altland+simons+solutions PDF link annotation
    • https://cdn.sqhk.co/poluxofad/igBhhhf/rally_car_tracks_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380691/normal_5ff4df7acfb21.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/idBiaSA/video_game_iphone_background.pdfIn PDF document text
    • https://nawamawivawugu.weebly.com/uploads/1/3/1/3/131398148/lokikoj_pepigukesose_neromotuvikumit_suriwasapada.pdfIn PDF document text
    • https://lobumemimakagom.weebly.com/uploads/1/3/3/9/133999871/371c1b47043cee.pdfIn PDF document text
    • https://jijajaxasivezix.weebly.com/uploads/1/3/4/5/134588510/4908910.pdfIn PDF document text
    • https://rarifipive.weebly.com/uploads/1/3/4/1/134131304/foselofegoja-xenoj-binoxijofam.pdfIn PDF document text
    • https://woxexawunum.weebly.com/uploads/1/3/0/7/130776255/ziwonuminujaxarifuja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402724/normal_5fcf25514c808.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5fc8112183ace.pdfIn PDF document text
    • https://cdn.sqhk.co/kekagate/cKSuQgi/business_intelligence_manager_position_description.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zegudonokor.epizy.com/gatineau_park_fall_color_report.pdfIn PDF document text
    • http://jejotatimub.rf.gd/exercice_orthographe_ce2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD328 7472 bytes
SHA-256: fb5b972d427abb0dca2802e59933d7fee2ef32b197bf21fab3245303caf13869
font_01_sfnt_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 4864 bytes
SHA-256: e3b7e7d321790d6ba86b0d638389e4d95c6543c157cf6d33b1ecaeffddcc9d1e
font_02_sfnt_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 10628 bytes
SHA-256: e6e858caef5a2b2bfdf07947dc8f7812f86510b4cbde0475feb9f8e452466526

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