Malicious PDF — malware analysis report

Static analysis result for SHA-256 704b273239a602f1…

MALICIOUS

PDF

66.8 KB Created: 2020-12-29 20:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 739ca08d532f5b9e419a86a86f210376 SHA-1: e599ceb466270bbf4ae57a998004f15f71a7893f SHA-256: 704b273239a602f1aabfacd25c070f56b3094255e72006247a01a6ff6823e853
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 numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. Although no scripts were extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for credential harvesting 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.
  • 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://trafficel.ru/strik?utm_term=joplin+mo+weather+report PDF link annotation
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/sijotow-tejosoduva.pdfIn PDF document text
    • https://jizuxiragoleti.weebly.com/uploads/1/3/4/6/134639642/fenegojafux-dopokosogo-watibadujuzabef.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/6840879.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/mavojefuzepi-midizuxag-worebix.pdfIn PDF document text
    • https://nifudosuv.weebly.com/uploads/1/3/4/0/134040563/3b205f6ceab03b.pdfIn PDF document text
    • https://denijebif.weebly.com/uploads/1/3/4/5/134584122/zukusexiz_ruxopevixa_tozeravesofa.pdfIn PDF document text
    • https://guxikotazo.weebly.com/uploads/1/3/4/7/134704652/b38db97b310a3.pdfIn PDF document text
    • https://fovavizudaz.weebly.com/uploads/1/3/4/3/134375550/2715697.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/2498cc7b-d0f4-454d-85a9-2f316ec82491/58167900205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9da9fe-7d1c-45dc-9baa-8e7768b0cd4f/dcuo_plant_healer_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/716a3a08-430f-4ad7-9ba9-19190da169c2/23874264584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691a80f3-6646-4e98-ab94-3885c99bc09d/house_flipper_guide_buyers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e209b6ad-ae04-4785-a0ab-f6b2835c933e/39261637922.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/3rd_conditional_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/hearthstone_deck_tracker_mulligan_guide.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_off0000cb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2A 4960 bytes
SHA-256: dc659dfce56b643409178eb00e81ea3e941755f65b9661a8df00d328413aecf9
font_01_sfnt_off0000dbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEE 10112 bytes
SHA-256: b0849aaf567981200803a3d10ec62ae2da3d169e202f16bf7688abb3ffb49ed3

Open this report in the interactive analyzer, or submit your own file for analysis.