Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1e2b2a68cdae4f…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 14:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eac22158b7abda6a156986364baa053 SHA-1: 5ec667adb02f4b1025fd59fc6dfcab46ca098a36 SHA-256: 9c1e2b2a68cdae4fc143c447e82c6cd25c545314df59e11a191e2c09462c75c4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, including a link farm, and one prominent URL that appears to be a lure for a phishing or malware distribution site. The presence of embedded URLs and the PDF structure suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=meteorology+study+guide
    • https://cdn.sqhk.co/jisanipu/hhdTHjg/learn_to_sew_patterns_free.pdf
    • https://cdn.sqhk.co/pifajaloro/ALPiggj/outbreak_meaning_in_english_urdu.pdf
    • http://nugowimabu.mywebcommunity.org/gozabonodemetovefatabadog.pdf
    • https://cdn.sqhk.co/rufosopufu/geggSie/you_are_god_s_masterpiece.pdf
    • https://cdn.sqhk.co/navimoxa/hhhfZgg/44220659751.pdf
    • https://cdn.sqhk.co/tezofugowura/jhjhjaN/26034601747.pdf
    • https://cdn.sqhk.co/natefisaka/VYNjcxy/bleacher_report_apply.pdf
    • http://puvepum.getenjoyment.net/automobile_engineering_rb_gupta.pdf
    • https://cdn.sqhk.co/junigofulum/2gf6KTP/youtube_mp3_player_online_apk.pdf
    • http://kedepoba.sportsontheweb.net/candidiasis_oral_en_bebes_tratamiento.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rijaliwiguvex/ferafigigotutekunawakum.pdf
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_f3b81a04672946c29adb0ed11458e745.pdf?index=true
    • https://s3.amazonaws.com/tevigotu/wutapevulugimeti.pdf
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_933fc26bb2194ddd8a005b9c55c5ab4d.pdf?index=true
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_59523008d7ba40259bf9abaf1f585623.pdf?index=true
    • https://s3.amazonaws.com/ditiruz/flower_art_design_images.pdf
    • https://s3.amazonaws.com/somamere/pifagewofelumerozumawum.pdf
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_6a7e9df63e4e4ab2b2b599628fa25782.pdf?index=true
    • https://s3.amazonaws.com/janodojivi/somewhere_over_the_rainbow_ukulele_tabs_strum_pattern.pdf
    • http://zowofiz.myartsonline.com/banezopagukinidura.pdf
    • https://s3.amazonaws.com/wanalovum/63201003073.pdf
    • https://s3.amazonaws.com/regegozumekoza/17115495767.pdf
    • https://s3.amazonaws.com/siwixomudit/peroruziwajuxedefena.pdf
    • https://s3.amazonaws.com/jovekus/danixufivuputotil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a0.bin
ae582c336ecf1b71e1a194396eb12043081643c4fa9b067b60abcba54b048b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 4892 bytes
font_01_sfnt_off00010366.bin
500f14fbf431ce0708b6c377e7ab2956e94eb00751e9b360d64b99b1f3ce22f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 11364 bytes

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