Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5df157f7111348…

MALICIOUS

PDF

96.9 KB Created: 2021-01-04 10:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cf87832bebd0341575cb1b390b36b279 SHA-1: ebae14e8a25e820df63030e0ee9d725152086b5f SHA-256: fa5df157f7111348f31510d8fd3895fba9d4a97b2907176c5350848d9152606c
156 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, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the embedded URIs, 'https://traffking.ru/123?utm_term=beth+smith+rick+and+morty+clone', is flagged as suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV also strongly indicate maliciousness, specifically a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffking.ru/123?utm_term=beth+smith+rick+and+morty+clone PDF link annotation
    • https://neboxikadifi.weebly.com/uploads/1/3/4/5/134588308/5be02e1.pdfIn PDF document text
    • https://menegelobeka.weebly.com/uploads/1/3/4/9/134903334/902ae20e75e1.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/2769223.pdfIn PDF document text
    • https://nebemono.weebly.com/uploads/1/3/4/3/134331812/833239.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/7d595f2d-ac46-42af-8a27-95c60db935f3/camp_green_lake_irl.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/keep_on_loving_you_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/90618503116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fd46b4-8627-4e34-af9f-1a10f77a3e68/mipozoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f626db16-430d-4589-b8f6-7b0e8c4c9186/gevewofijubukufuvufijine.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/the_wheels_of_life_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/bharatanatyam_songs_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08aa6f2-06b8-4dd3-a411-18f9211ff7e5/netukakosimigab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb8a8b3-e92b-4795-bbcd-e7ab88eda64b/9092495342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024cfc23-483a-4fb4-bd96-230d5de09a10/9048038462.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/xizigu.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_off0001407c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407C 5396 bytes
SHA-256: 36a347051083eb74ef138f2cef7877141e580ff0d18e2083b9c02fc99618ec6d
font_01_sfnt_off000152b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B5 10456 bytes
SHA-256: e92338e2fd8e47ee06303985237169fbbe5b5c446b59842fb146dc2491216793

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