Malicious PDF — malware analysis report

Static analysis result for SHA-256 2144f6386e222c28…

MALICIOUS

PDF

78.4 KB Created: 2021-03-01 09:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9076e64dafb561041abf049f4602b994 SHA-1: cd34b83e3fed6d69ed4223598894258d7c8a14a1 SHA-256: 2144f6386e222c286d4be6062dfb1978d9a4e1f1ab63e462e4f3288edb665b80
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/aws?utm_term=vince+gironda+diet+36+eggs PDF link annotation
    • https://cdn.sqhk.co/rorefevobo/jhDidgh/66137404059.pdfIn PDF document text
    • https://cdn.sqhk.co/tipekafomube/EYNiaPb/beholder_free_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/C8PhaXK/sububidoxobete.pdfIn PDF document text
    • http://vengriya.space/hierarchical_clustering_numerical_exampless82g.pdfIn PDF document text
    • http://hushseo.online/nuratujofufmt0m.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/xetumutupamigusatiwiked.pdfIn PDF document text
    • http://rizaluvenore.iblogger.org/dixuzabulu.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/4EYqTie/96833186266.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/icidia4/jetpack_joyride_for_windows_8.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/macbeth_act_4_scene_3_analysis_cliffsnotes.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/fh52Czm/careers_flower_power.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/40188874080.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/39817202853.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/jhcyPNz/what_episode_did_howard_wolowitz_mom_die.pdfIn PDF document text
    • http://lastmarkt.ru/bangla_baul_video_song_mp44parm.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/how_to_troubleshoot_website_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/jfUhc3j/peace_love_egg_roll.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
    • https://s3.amazonaws.com/mukut/bekhayali_song_lyrics_mp4.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 5148 bytes
SHA-256: ea1ee8ae91a5325fe2b6ab72f70fd0afbf4bf8742cae6f881f385943740e9628
font_01_sfnt_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 10260 bytes
SHA-256: e4c1db70d9291aacb30e35f5e47ddc9bc875e8a27412bc3a0a396be8a850ad4d
font_03_sfnt_off00011de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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