Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf89aaebadafdae…

MALICIOUS

PDF

76.7 KB Created: 2021-01-23 16:22:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3d8baa174b7495fbf099a7fbd5c21ddc SHA-1: 956f007c7898256f42fab489b645e079f6bd2026 SHA-256: abf89aaebadafdae190a6493f6d11998ca50cf323ffef75eab84b9f336a40f66
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'trafficel.ru' and disguised with a search term related to piping guides. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and URL analysis point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=asme+b31+3+process+piping+guide+pdf PDF link annotation
    • https://site-1253095.mozfiles.com/files/1253095/96203671501.pdfIn PDF document text
    • https://site-1246361.mozfiles.com/files/1246361/bang_bang_movie_song_free_djmaza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5fde03da9232e.pdfIn PDF document text
    • http://golulim.iblogger.org/agenda_format_in_sinhala.pdfIn PDF document text
    • https://cdn.sqhk.co/kesufetumo/gphitid/oxygen_levels_after_covid_19_recovery.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468261/normal_5ffa996c2e3d4.pdfIn PDF document text
    • https://site-1256720.mozfiles.com/files/1256720/wajid_ali_baghdadi_ke_song.pdfIn PDF document text
    • https://cdn.sqhk.co/momebuman/RLbIfdy/epic_skater_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/8AGWik7/charm_city_kings_hbo_channel.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/ghKicUa/javezajaxonovu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497369/normal_5ff175c6bb39d.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/iaichKz/go_kart_go_ultra_apk_mod.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
    • http://mujujum.epizy.com/abcd_2_movie_3gp_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/clown_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/apa_style_research_paper.pdfIn PDF document text
    • http://tuninedup.epizy.com/74748199345.pdfIn PDF document text
    • http://kobinegugagikag.epizy.com/842651744.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/brookfield_dv2t_viscometer_manual.pdfIn PDF document text
    • http://xegubidutanaza.epizy.com/76745408264.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 5380 bytes
SHA-256: 8804623a33914620a190f84a5d2e6d3610c7e41e1454069f4b73649aa1405da5
font_01_sfnt_off0000f3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 10560 bytes
SHA-256: 7da9ea15f40184987ac65e1119b6f2120c919a17a39c3f87e1a4163658f87a9f
font_02_sfnt_off0001179b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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