Malicious PDF — malware analysis report

Static analysis result for SHA-256 defc6d7154b3143a…

MALICIOUS

PDF

102.0 KB Created: 2021-03-23 21:35:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2f53818a0f309559c87df5d669580647 SHA-1: 8ec298bc5f11beec473596f7b9266a5bea78ff79 SHA-256: defc6d7154b3143ad93a9a14e8209de5aa810757048c0aa678168fe06fbb0453
196 Risk Score

Malware Insights

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

The PDF contains multiple external links, including a redirector to 'dugedepap.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a technical issue. The presence of numerous external links and a high ML classifier score indicate malicious intent.

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.
  • 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://dugedepap.ru/strik?utm_term=why+does+my+samsung+s7+keep+shutting+off PDF link annotation
    • https://kizofirelurok.weebly.com/uploads/1/3/1/6/131606598/fapodowojezi.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/2010_dodge_journey_sxt_repair_manual.pdfIn PDF document text
    • http://thiswaytovogue.com/85033127061zkx56.pdfIn PDF document text
    • http://pitushok.fun/sogamuzidesapamamowxr1x.pdfIn PDF document text
    • http://simultaneously.space/medical_anthropology_and_sociologygbsp9.pdfIn PDF document text
    • https://kufurana.weebly.com/uploads/1/3/1/4/131482954/rosasido.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xepatodop.onlinewebshop.net/76916920286.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/96058684696.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/42584121369.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/zereditediwimakave.pdfIn PDF document text
    • http://kusikegu.rf.gd/about_planets_in_solar_system.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/how_to_count_dividend_per_share.pdfIn PDF document text
    • http://jotikovan.rf.gd/pengertian_atresia_bilier.pdfIn PDF document text
    • http://nabunuwo.epizy.com/bobby_mcferrin_23rd_psalm_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/hampton_bay_ceiling_fan.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/flame_test_lab_worksheet.pdfIn PDF document text
    • http://wefebasutij.epizy.com/mizedusiserofotakotiv.pdfIn PDF document text
    • http://vikudet.epizy.com/why_is_my_ilive_sound_bar_not_working.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000150ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150AC 5584 bytes
SHA-256: 3be9bd5283a45eb80e9ce9920595e96ffc0f30d366828114f6da939bf38d37df
font_01_sfnt_off000163ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163AB 11432 bytes
SHA-256: f4914a3df010b2581ce9a31a5b00baa2b1db7344ceb5a60a59fa1e29a4b54587

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