Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe78e1abd6d66e7…

MALICIOUS

PDF

75.1 KB Created: 2021-02-13 16:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2f08052d559d2bbf8f11b76beb2f32ee SHA-1: ac71f38aa0a9aac26867a2664ee62d593a0d5e73 SHA-256: dbe78e1abd6d66e7fe5170081243c1950e0986b9e7959dff21108675c42ffadd
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and a link farm. The presence of numerous external PDF links, including one pointing to known malicious redirector infrastructure, strongly suggests a phishing or malware distribution campaign. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific content or intent beyond link manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=iccv+2020+dates In PDF document text
    • http://austritkfa.com/14552895945n4jh9.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/3158352.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/iPy4pCH/amazon_prime_video_streaming_services_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/murofoli/hdBjfha/live_neon_wallpaper_apps.pdfIn PDF document text
    • http://checkmycredit.info/adobe_media_encoder_cc_2014_crackdm0lw.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/fS5fE36/zerolirota.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/fSgfDib/the_banner_saga_2_pc_gameplay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/jijofotaxawi.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/diablo_3_seasons_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/fakifodirinasujobevelobom.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/bewars_telugu_movie_audio_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/67901905351.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/turagafufaguj.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/atm_card_application_form_sbi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/bandaranaike_international_colombo_airport_live_flight_information.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/puroduxevetaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/79427658810.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/bhojpuri_movie_video_song_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/chunky_platform_ladies_shoes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB90 5076 bytes
SHA-256: 5c20ad83fa3922200fad92cf9070f42bd9244a326584cd707d476e3bec9cd23d
font_01_sfnt_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 10028 bytes
SHA-256: 6ba3ae0cdf32b29fdd507107e88d0cfe3a3cc2950fae1675a6b499f01493f97d

Open this report in the interactive analyzer, or submit your own file for analysis.