Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b6685cc3d629b2…

MALICIOUS

PDF

70.8 KB Created: 2020-12-13 13:04:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 582a86cefe0e15c22048afd8b9e087c1 SHA-1: b79790b88571916729fd32b97ee305bac4a891c8 SHA-256: 74b6685cc3d629b28eafe2ee1e895074f2c506ad8b188af0e26439422186e30d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to disposable hosting, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=ryobi+weed+eater+battery+life PDF link annotation
    • https://fikepeti.weebly.com/uploads/1/3/4/4/134489659/renubijebewisugipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f99dac638c18.pdfIn PDF document text
    • https://xilamebi.weebly.com/uploads/1/3/4/5/134598653/nuban.pdfIn PDF document text
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/tozila.pdfIn PDF document text
    • https://manajizi.weebly.com/uploads/1/3/4/9/134902852/3821617.pdfIn PDF document text
    • https://bugituwixumanuz.weebly.com/uploads/1/3/4/7/134722584/8528703.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/1e854738-d961-4b14-935b-e02daa4f8b1c/ken_stabler_stats.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/successfactors_login_uc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1f62ae-f29b-4bad-a138-67d4a5f5edfc/love_song_for_a_vampire.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/longs_peak_united_methodist_church_longmont.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1dc54be9b693951118edb/t/5fcc1fd0260a660a6bcaf8aa/1607213009179/zaruwogezelorekatogog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62f384d7-c278-4f95-8115-c4e9dab322ca/31210764138.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/53726777623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb4b0958-e49c-4cca-a613-a4bacda9b48a/lozefesap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/488fc27b-6a1b-4bf7-9627-bac96383979f/gigapirupefomiw.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/astrology_books_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fc738651d106d256bbed2a0/1606891623308/zukozawegubelodejivafisu.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_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 5064 bytes
SHA-256: 041338415fb3ffea94327c00b06ea866feeff22eaaf5a7282fd2c999be22cff7
font_01_sfnt_off0000eb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0A 10400 bytes
SHA-256: 97a36c7f61361b16d2c2cfcf09bb34cb096d2c72e6b90d725bd3f4b594263134

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