Malicious PDF — malware analysis report

Static analysis result for SHA-256 13dc6a8409fad73c…

MALICIOUS

PDF

84.2 KB Created: 2021-04-07 01:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e98bdad6a349f52c263c1ae8181bb7cb SHA-1: 82dcd25b3450ee1cf3bc3b01cb972d13e2a3dbb1 SHA-256: 13dc6a8409fad73c348f0f00fb9247b7f51552c2598dba9b72c391b237f59ac4
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 0.9993

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://druttle.ru/strik?utm_term=pictorial+key+tarot+deck PDF link annotation
    • https://cdn.sqhk.co/xiwasazafu/kjj6bvW/puxalow.pdfIn PDF document text
    • http://rakuwotakiko.22web.org/gajalujefiwoduvopona.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/gyNngg6/90659975706.pdfIn PDF document text
    • http://zagadiba.22web.org/kupuwewibevuwipovejoniner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_604bc18c2c320.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/jhjbhcB/weight_loss_workout_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/iBhi50o/96330473760.pdfIn PDF document text
    • http://vivuwolijerina.iblogger.org/74332915001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5fea1a09b7f75.pdfIn PDF document text
    • http://xifamopituwoti.iblogger.org/81914648220.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/gczCwO0/36011231415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_602940b17bc94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_601e666b7cd3b.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/3ef87535-1495-4ba3-aaed-970ff3d43555/romeo_and_juliet_act_1_scene_3_short_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26ab747-b29b-4e10-b714-b54f278631e4/how_to_fix_a_hitachi_tv_remote.pdfIn PDF document text
    • http://nekifosokabopaf.epizy.com/tefuwurilokefeteso.pdfIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_6fa42ee3c20f4f498a2afb8d2870a52e.pdf?index=trueIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_61e88043723e48c880f71a9b2c1372e3.pdf?index=trueIn PDF document text
    • http://dogivazisuj.rf.gd/como_funciona_un_servidor_web.pdfIn PDF document text
    • http://fubejubede.rf.gd/dadazumuxefak.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_861a6753c2914e8aa945d56a7a62568a.pdf?index=trueIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_c21f4b3b00194a388dbe4fedbf5251fd.pdf?index=trueIn PDF document text
    • http://jusowegakero.epizy.com/28352204716.pdfIn PDF document text
    • http://zasegusof.epizy.com/48704761584.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_off00010e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E26 4920 bytes
SHA-256: 70bb8a3ecbedd7d4483fd5db4ff20c5f104cb9431ba0008d0b7c49e476be20b1
font_01_sfnt_off00011efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFB 11068 bytes
SHA-256: 775cfecd4b78baf44551eedfade4142b2e8292605455667675b5bd09fb245e4a

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