Malicious PDF — malware analysis report

Static analysis result for SHA-256 318896a1b5598477…

MALICIOUS

PDF

82.6 KB Created: 2021-03-22 01:15:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ee30a4054037c0f72cb5402a95cf9231 SHA-1: 222422faee31b9b133e47fa0109f3eaebc3657a3 SHA-256: 318896a1b55984776ace2fe111c6201c3e145d723a2578f1f7009d743daf8a83
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or a scam. Although no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=defiant+timer+49814+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411681/normal_602de64e14267.pdfIn PDF document text
    • http://kowojogu.iblogger.org/kaborupavuxoduv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413119/normal_6017a5c2eb6e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447095/normal_60285df77e1b9.pdfIn PDF document text
    • http://kunakeveguf.iblogger.org/toefl_practise_test.pdfIn PDF document text
    • http://lezesujis.22web.org/law_of_acceleration_problems_with_solutions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409258/normal_6029a1859e0d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gurumuniz.rf.gd/estimation_and_costing_nptel_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/fire_alarm_installation_guidelines.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_43964d7aad924b229cc4422d5d3cc862.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/nuvor.pdfIn PDF document text
    • https://5637a596-61ce-4e67-8953-8fd9cb84b940.filesusr.com/ugd/c20ea7_db1c30ce78604eaf8687929f28c880f7.pdf?index=trueIn PDF document text
    • http://tazomibege.epizy.com/78609460532.pdfIn PDF document text
    • http://wilafeduzavedew.epizy.com/38111269148.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/barber_of_seville_figaro_aria_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/bound_synonym_formal.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/57253426597.pdfIn PDF document text
    • https://38a589f5-619b-4230-bc7d-f88d9fc6dac5.filesusr.com/ugd/392051_dedc711f134941dd8ef04adaa6215ea6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/filatofagarubivotij.pdfIn PDF document text
    • http://siwojanapav.epizy.com/talking_tom_game_apkpure.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 5484 bytes
SHA-256: 6bb19adf55f73ee9181ecb093f8418558f5c7e46062fa88a70a1ab3c4b8229cf
font_01_sfnt_off00010d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D85 2280 bytes
SHA-256: 798b7db96da7cd9018d53225d8618bed9d74414aad2f125a3486e3853de62d3c
font_02_sfnt_off00011762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11762 11004 bytes
SHA-256: c027c8d6c3fed79fa87e5fb16998ab86bde3c986d61c171f9d249e18b75e0606

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