Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9e9faf35e70f3c…

MALICIOUS

PDF

80.4 KB Created: 2021-03-14 20:14:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5ce451c161d11a31f2b7a8ee8c8e886 SHA-1: d6414da7fbd1013f7443e0ce009223ef669ee059 SHA-256: ed9e9faf35e70f3ceea60d7467e17e5fc592980681a610ca8ed9c6e1713e26cb
156 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://pelibifir.ru/123?utm_term=atulaya+jammu+online+report, which is likely used to redirect users to malicious content. No scripts were extracted, but the PDF structure and heuristics point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=atulaya+jammu+online+report
    • https://cdn.sqhk.co/sojuzafu/ifiiN28/26202269301.pdf
    • https://cdn.sqhk.co/dajusonas/eVzLphf/wivaju.pdf
    • https://cdn.sqhk.co/luzorisu/hejf5jc/web_design_flyer_template_vector.pdf
    • https://cdn.sqhk.co/vomisape/63jfPge/wibusukedemuzukekot.pdf
    • https://cdn.sqhk.co/zupuguvawaj/hIijjei/video_chat_apps_for_android_and_iphone.pdf
    • http://kazedoruredupe.22web.org/euphemism_practice_worksheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_378ed838b43544d8bf2c703ab4b4ada4.pdf?index=true
    • http://bamasagure.epizy.com/citroen_c3_desire_2005_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/bc65414a-2036-4c11-b9cf-f692e757a222/tebimusogegodunu.pdf
    • http://vekimawo.rf.gd/nephritis_lupus.pdf
    • https://s3.amazonaws.com/likerajatob/aaa_games_coming_to_android.pdf
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_92f7c029dcac4250ac2bf9a6229dad0d.pdf?index=true
    • https://s3.amazonaws.com/pusixa/bomolumejejuleri.pdf
    • https://s3.amazonaws.com/fadedosi/why_do_stars_appear_to_move_along_arcs_in_the_night_sky.pdf
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_4e377262ff64433cab5598c914721740.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d8c76cf9-cecb-412a-8e0c-dc28a5897d62/new_testament_books_written_as_letters.pdf
    • http://xitutudatiri.epizy.com/dirowib.pdf
    • https://s3.amazonaws.com/bevekizadoxuj/closing_stock_value_in_balance_sheet.pdf
    • https://s3.amazonaws.com/dobikasukavu/11437981334.pdf
    • https://s3.amazonaws.com/liwafo/how_to_connect_auvio_speaker_to_computer.pdf
    • http://zojasofox.epizy.com/lonely_together_song.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/rakagilipugupirikav.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_off0000febd.bin
95a692bf756b508199975298e64b2da4f2857ff5e4e39786b22f79899e089ef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBD 4952 bytes
font_01_sfnt_off00010f8e.bin
d179edf2182af39af562eedb03c79dfcd6d3c01845052167df9d5bd99390b5a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8E 10884 bytes

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