Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45da6da9c10e4c8…

MALICIOUS

PDF

102.8 KB Created: 2021-04-08 17:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 86a392bd6c97fcb15b68cae16c82b17b SHA-1: 84392839749926e68571bc5ed474212aeaf5dbe2 SHA-256: c45da6da9c10e4c8062467ac170da5e0f3eb67813430adef8703b7eeb42d789b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://jumiwimov.ru/strik?utm_term=briggs+and+stratton+675+series+190cc+carburetor+kit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375203/normal_5ff541767d915.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/dijSagf/dynamons_world_no_360.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475197/normal_5fe297022993a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5fe8bcabb3c09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450042/normal_60000dcc6ea83.pdfIn PDF document text
    • http://vedevejunogi.iblogger.org/xejatojapi.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/R1ifOyu/call_of_duty_mobile_garena_di_pc.pdfIn PDF document text
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/7875419.pdfIn PDF document text
    • https://bewanabexujafo.weebly.com/uploads/1/3/6/0/136050633/gebedetosenolafega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_6058dcb652f95.pdfIn PDF document text
    • https://mizovitima.weebly.com/uploads/1/3/4/2/134266674/bf165d6898e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_6051e7a5107cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465702/normal_602d362e320da.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/37dc36b98465b3d.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/jVmhjhb/free_online_marketing_courses_for_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pubejajefili.rf.gd/android_8_store_photos_on_sd_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7fb7d5-7698-4dc3-9d2a-85666549a90a/49682201854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd3eaf9-c768-4c70-a872-afa0fc01ea2a/44503382041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a738d3d5-4a54-42f7-a7ee-f2aa105d4341/proper_nouns_worksheet_2nd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55fb4b79-94bd-4b89-aafc-081c664caa29/altered_carbon_netflix_series.pdfIn PDF document text
    • http://ronojegev.rf.gd/77993456847.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F79 6036 bytes
SHA-256: 4f5defc4529e0acf08c9ab3b0b9987bf0690d2913b340910dae682c401e8f12d
font_01_sfnt_off0001641e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1641E 12524 bytes
SHA-256: 5a929858f4a6c79e8a2297f31c88e88af76c2141cc8e76a9ebcda744186ac419

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