Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98d5254ab5a0eef…

MALICIOUS

PDF

86.0 KB Created: 2021-03-22 16:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f1af25c00bd9167f0719ec3c7970655e SHA-1: a5c96c21cbf217fb3d294f3dcd85136ee61059f0 SHA-256: a98d5254ab5a0eeff248b6d1a60b06476376c69186ec619c791d28aaf6e8d010
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting or suspicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing malware. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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 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://druttle.ru/award?keyword=valorisation+du+caroubier+pdf PDF link annotation
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/paxilog.pdfIn PDF document text
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/4320235.pdfIn PDF document text
    • https://bekujorukop.weebly.com/uploads/1/3/4/0/134016765/1a088dfd.pdfIn PDF document text
    • https://mepokebifonamos.weebly.com/uploads/1/3/4/0/134096039/62f7e8af220c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367019/normal_5fc603e20e820.pdfIn PDF document text
    • http://bonus332.site/akella_raghavendra_anthropology_bookc7v02.pdfIn PDF document text
    • http://newyearshop.site/whirlpool_cabrio_platinum_washer_code_sdab6yr.pdfIn PDF document text
    • https://monubigikupo.weebly.com/uploads/1/3/4/4/134493781/b83e5530dc255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_5fd7bf71264d2.pdfIn PDF document text
    • http://profyhouse.ru/how_to_help_with_child_anxiety8kri5.pdfIn PDF document text
    • https://dasajusowerav.weebly.com/uploads/1/3/1/6/131637273/2326509.pdfIn PDF document text
    • http://reduslim-shop.site/managing_bipolar_disorder_worksheetsu6580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_602efe0e5e8ae.pdfIn PDF document text
    • https://pasironukid.weebly.com/uploads/1/3/0/8/130814081/xurufaroto_nozozipobu_desagumidup_fexezufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410989/normal_5fc6fea2762e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_60302c63574ca.pdfIn PDF document text
    • https://mixezefu.weebly.com/uploads/1/3/0/8/130874535/35bfa797b883f.pdfIn PDF document text
    • http://nuverlites.online/pisoxezbjsm0.pdfIn PDF document text
    • https://sodipojemip.weebly.com/uploads/1/3/5/3/135325099/8470465.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b170d9-970c-4dd9-a929-37f4aec2b77b/mofafaloxinugow.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/29938634607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16182a6e-684e-49f6-bf27-fbea41a4aada/dovepiruderukoxov.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/kasazogal.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/dejozosofuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/bujedowaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/73692027065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b045fd1-b599-4ef4-84a4-b5f0dedb868d/used_ranger_boat_covers_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af9873f-af5c-40a2-9c87-3d77ea06f0b0/xipetowudirifulir.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_off00010db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 5252 bytes
SHA-256: 5d761851765da8750929cdc1d043bc9ec5ff8b62c63a87ffeb602659541fc848
font_01_sfnt_off00011f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9B 12892 bytes
SHA-256: 9573af0f4b5453df5f56dfe2e7a433ff9f6029d3c17c2b659cfff1123c55e1b5

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