Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e582514f40bdf80…

MALICIOUS

PDF

96.2 KB Created: 2021-03-25 07:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eac9dc7a9af6f6afab9f1b6a130cd35c SHA-1: df54a2bd978a8279c097676e44442948287c2fe2 SHA-256: 0e582514f40bdf80b1f6ec2debac965b4aac8c74ce8f54c4582311ea475245c1
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users. The primary URL, 'https://nipisod.ru/wix?keyword=yamaha+mx61+v2+user+manual', is presented as a user manual but functions as a redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://nipisod.ru/wix?keyword=yamaha+mx61+v2+user+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457838/normal_60083607344cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_602df159e81cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_60135fd3c46bc.pdfIn PDF document text
    • http://ctuxuu.com/pista_de_carreras_para_imprimiryo94r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5fd64ef0df741.pdfIn PDF document text
    • http://fredo.run/onkyo_hf_player_app_reviewmm2g4.pdfIn PDF document text
    • http://pannochki-art.com/ceramic_materials_science_and_engineering_exercises_answers64mad.pdfIn PDF document text
    • http://bestplacefor.rest/77050737017mwou.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462678/normal_5fdc78b59ae4a.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_3e7b4701209746318ed9e73dbb99a82f.pdf?index=trueIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_2f61338bedb24bcc900e2d7fbd225d7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/bejeweled_2_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/39593011274.pdfIn PDF document text
    • https://170d08c7-2527-4f8e-8bc4-cf7f6ffab704.filesusr.com/ugd/afe24e_b86b418ab8314e8f92050f1607b821b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/wexawepumapojeri.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/bengali_cartoon_film.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_06f45b122ea44067a15e57e16bcf1aea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/how_to_setup_a_cradlepoint_router.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/panasonic_kx_tgp550_ip_address.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/remington_14_inch_electric_chainsaw_chain_replacement.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_50a5e73afe3340c8b79015d9ec3235ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/55387884079.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_off00013277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13277 1684 bytes
SHA-256: 51fdace8bd53b7d2e6af2c0ab3a57c298b99a0f760d42a36c32010743562cd6d
font_01_sfnt_off00013adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADB 5352 bytes
SHA-256: d6a8bd00962f9a1afd301ac20bc90a466c3809280ca3c9e3db954c92a35c1259
font_02_sfnt_off00014cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF7 11112 bytes
SHA-256: bf78053c6dbad92765cf42ed9578f71afce83333f93d3557c407a6f223bb7930