Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4885668fedbad94…

MALICIOUS

PDF

87.6 KB Created: 2021-03-11 21:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b2d431793b22f7dd867980d14c9b97 SHA-1: 7899026563e7fcc3387e03a6d937aac29b522bb2 SHA-256: d4885668fedbad94a1930ea855c3844afa043995f0905c8894181239b340a681
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or trojan distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/123?utm_term=minecraft+pe+crafting+guide+app
    • http://fajasated.mywebcommunity.org/86017344004.pdf
    • https://cdn-cms.f-static.net/uploads/4366324/normal_6024b9f8a6bb0.pdf
    • https://cdn-cms.f-static.net/uploads/4420761/normal_6022eb8b05b4e.pdf
    • https://cdn.sqhk.co/jaselavujuwi/hjhjWjf/knife_sharpening_rod_vs_stone.pdf
    • https://cdn.sqhk.co/gufemazibafi/kJjcVge/wish_you_were_gay_claud_letra.pdf
    • http://rijunoje.mygamesonline.org/dugifolaza.pdf
    • https://cdn.sqhk.co/sozivowemin/h20isjc/fanaticals_hoops_basketball_shot_challenges.pdf
    • https://cdn.sqhk.co/kizafizutuw/3Ujchgj/kesemijop.pdf
    • https://cdn-cms.f-static.net/uploads/4481161/normal_6035c4097a27d.pdf
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/zuvop.pdf
    • https://peminikagi.weebly.com/uploads/1/3/1/8/131856713/3b35c6b8ad44.pdf
    • https://cdn.sqhk.co/vapatibu/dicnjjT/bingo_themed_party_decorations.pdf
    • https://tenuzovew.weebly.com/uploads/1/3/0/7/130740022/5cffb6b377ea286.pdf
    • http://kifejuja.medianewsonline.com/lean_canvas_example_uber.pdf
    • http://gixodugesu.medianewsonline.com/7356507211.pdf
    • https://cdn.sqhk.co/tajudozizif/Umgfhej/star_wars_galaxy_of_heroes_mod_apk_2019.pdf
    • https://cdn.sqhk.co/zepinima/fhhGTgf/best_tuner_for_6._7_powerstroke_2019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/923e603d-effb-4dc0-a6d4-08bda5fe854b/ascii_chart_hex.pdf
    • http://sogivuwe.onlinewebshop.net/pafasexosisapoxutugalile.pdf
    • https://uploads.strikinglycdn.com/files/c1d737ae-8812-4b09-959b-907983394501/walmart_grocery_store_hours_christmas_eve.pdf
    • https://uploads.strikinglycdn.com/files/2276208a-83ff-4265-946d-3c9577480261/diablosport_intune_i3_platinum_silverado.pdf
    • https://uploads.strikinglycdn.com/files/32f73fd7-906f-4c69-abe3-a9a801996abd/infinix_note_8i_price_in_bangladesh.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001050f.bin
5ace839e80ace324865d384ccc2ce937ebb58a33530ece5df4dbf04beaf8d485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1050F 4888 bytes
font_01_sfnt_off000115bc.bin
1b4db87f99abe5e2903e61744f7791f46c6c2a9acc1d856f28b6cf037bef1ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115BC 14084 bytes
font_02_sfnt_off0001428d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1428D 4324 bytes

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