Malicious PDF — malware analysis report

Static analysis result for SHA-256 e827c247cf6e1e7c…

MALICIOUS

PDF

68.8 KB Created: 2020-11-25 22:52:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7842d02844cadaafacb1463e41e3cbbe SHA-1: 90edda4e4e7bfacdcd49b0ad9d646f73ee272a7b SHA-256: e827c247cf6e1e7c1052af592e3f601a05e50a17b82fe385fb6e48f9c65f565c
196 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 pointing to PDFs hosted on S3 buckets, which is characteristic of SEO link farm abuse. One of the primary links, 'https://trafficel.ru/aws?utm_term=vidmate+app+2019+free', appears to be an SEO redirector designed to lure users with terms like 'vidmate app 2019 free'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafficel.ru/aws?utm_term=vidmate+app+2019+free PDF link annotation
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/717030.pdfIn PDF document text
    • https://visemuturivawo.weebly.com/uploads/1/3/4/6/134673250/dovewaralarunipek.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/xinemamixo.pdfIn PDF document text
    • https://virukuzababije.weebly.com/uploads/1/3/4/3/134350100/fabotinavawo.pdfIn PDF document text
    • https://ruwaderuxelelu.weebly.com/uploads/1/3/4/6/134651282/popavaroduk_bijipa_fogufefefej.pdfIn PDF document text
    • https://dekobela.weebly.com/uploads/1/3/4/3/134332871/4279098.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/4249799.pdfIn PDF document text
    • https://lefusavuforuv.weebly.com/uploads/1/3/4/4/134490278/tunurilos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/47169256624.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/63857970032.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/kagubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d40a7b-46c7-4d11-a165-c0a5767902c1/rosoxazevenaxas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc3f5b3-5138-4ff2-8b77-509c95f5d694/59227384424.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/brake_and_light_inspection_oxnard.pdfIn PDF document text
    • https://s3.amazonaws.com/sirasu/function_of_beauty_shampoo.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_off0000d037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD037 5424 bytes
SHA-256: 07278fdf7b9ceaf92ad2d71e245975fd65aa3f62eb1d0ff9525442ff00528775
font_01_sfnt_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 10548 bytes
SHA-256: df406da8faf86ad334666d58a3b443285a29ad43a133a2a79e5f57c3b5d471c1

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