Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efe7eff13f1dcd3…

MALICIOUS

PDF

78.8 KB Created: 2021-03-09 14:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b57b93af0763a37d7abaea7224698d40 SHA-1: 91cc19237331b12b8b7786bf7a3e4b1ecd7d294c SHA-256: 4efe7eff13f1dcd3aec701305ee2cde8449ac94fa85fd7b9dbfd4d54e3e00d4c
252 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and ClamAV, indicating it is likely a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to host malicious content or redirect users. The presence of a 'download button' lure further supports a malicious intent to trick users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/aws?utm_term=datamax+dmx-i-4208+driver+download In PDF document text
    • https://sarefipa.weebly.com/uploads/1/3/1/3/131398419/917d3.pdfIn PDF document text
    • https://kadamoxezegawuf.weebly.com/uploads/1/3/4/3/134347408/jexoke_sovumam_baradipalef_bunezokogeno.pdfIn PDF document text
    • https://voxesisa.weebly.com/uploads/1/3/4/3/134349259/5ad9f61.pdfIn PDF document text
    • https://fivaxozokudok.weebly.com/uploads/1/3/6/0/136049694/gunukabibijivip_fuzidisogotofu_jawunugobosuz.pdfIn PDF document text
    • http://totalcreditreport.info/80935928064co70x.pdfIn PDF document text
    • https://fuzurisef.weebly.com/uploads/1/3/4/3/134369427/zijadixipexuni-wikarikexoke.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/best_portable_car_jump_starter_with_air_compressorzxab5.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/nozed_pusinofof.pdfIn PDF document text
    • https://jewizebalize.weebly.com/uploads/1/3/4/6/134618682/nagokowunipoti-daresimej.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/wuketoxa.pdfIn PDF document text
    • https://lowarimubabop.weebly.com/uploads/1/3/4/7/134712264/7843993.pdfIn PDF document text
    • http://didolirepa.iblogger.org/how_does_thyroid_hormone_affects_menstruation.pdfIn PDF document text
    • https://tedogiji.weebly.com/uploads/1/3/0/7/130775371/kotilapeke.pdfIn PDF document text
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/jimotapexiw-tuseg-kazaw.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/vimejimuvizetiju.pdfIn PDF document text
    • http://luxshop21.site/98121492506eaiv3.pdfIn PDF document text
    • https://menuwenuxunok.weebly.com/uploads/1/3/4/6/134682317/7178715.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/guxoruvesufujutanudxt9pi.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://gagarereforer.epizy.com/50550276408.pdfIn PDF document text
    • http://xunevonobi.epizy.com/thumbs_up_meme_template.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_off0000e81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81A 5388 bytes
SHA-256: 8e439d16c9a3220e8c174ea2d5f1bf9a41f90286860d007ee9304f5736627ef1
font_01_sfnt_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 10892 bytes
SHA-256: 4fbbfd719442386b99bb829c0cd8fc7ad67b14a4ba09bff838913ecd77950472
font_02_sfnt_off00011fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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