Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d314612f796920c…

MALICIOUS

PDF

90.9 KB Created: 2021-03-15 01:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fd30b4680ea7a248cc33a66092884e9f SHA-1: 8d8b1d8adda2de73658ed2c5c7d964323292f245 SHA-256: 4d314612f796920c27aae9e2511fc2501403a861092afdd82d542eae41cb4c15
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The embedded URLs point to suspicious domains, suggesting the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=epiderme+vegetal+pdf PDF link annotation
    • http://betogav.22web.org/vozogoxupoxakavefutupe.pdfIn PDF document text
    • https://cdn.sqhk.co/sudidoxa/zRgeNgv/vlc_player_android_auto_video.pdfIn PDF document text
    • http://megaparegeduze.iblogger.org/84970935001.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/jaWhcO0/91256954974.pdfIn PDF document text
    • https://cdn.sqhk.co/gasawivu/4Ejb4mU/goluk.pdfIn PDF document text
    • http://vobonenagixavus.66ghz.com/amelia_bedelia_means_business_guided_reading_level.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/hRigt2e/83320699153.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/j1jjcin/racing_point_2020_car_mercedes.pdfIn PDF document text
    • http://nafuvexozoli.iblogger.org/765764884.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pifazudiso.rf.gd/45889972608.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_844fd399c52447f2b2c305415a0e4d7e.pdf?index=trueIn PDF document text
    • http://rinexevijexaxi.epizy.com/354_amendment.pdfIn PDF document text
    • http://delixerilebuk.epizy.com/sixekef.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_1dabd386dff24a1f803db751a6429b35.pdf?index=trueIn PDF document text
    • http://pagupim.epizy.com/8090992674.pdfIn PDF document text
    • http://bojaxalajavog.epizy.com/easy_math_riddles_brain_teasers.pdfIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_215a402ab036451494fe94a256792a1a.pdf?index=trueIn PDF document text
    • http://vepejiwuj.rf.gd/vovilapuvawoxuzumoz.pdfIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_865f26ceae5343f798b69c86a4f1dd29.pdf?index=trueIn PDF document text
    • http://mogigavuxifiti.epizy.com/81896517901.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_off0001150c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150C 4772 bytes
SHA-256: 849e3cef851525d2b4b94a50aa3717a2e98e79061d0ed317a67c49995aed0d25
font_01_sfnt_off0001254d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254D 13444 bytes
SHA-256: f00d7c14ab1e1b41ecc636ecf584b741b6079251a380794a00046b8e526a856a
font_02_sfnt_off00014efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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