Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c8d2b0384544cf…

MALICIOUS

PDF

73.0 KB Created: 2021-03-09 19:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 382893200eea2d83dd8485da4fda06e1 SHA-1: c8e6f52ca705a2a4113107121fe686d40e2414f3 SHA-256: 65c8d2b0384544cf74fbbb5eb653536928307430d72d5c22ffc57fbd5cc76100
186 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 probability of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or distributing further malware. The document body, though partially corrupted, contains keywords related to 'Fannie Mae guidelines', likely a lure to attract victims interested in financial or real estate information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://xajibur.ru/123?utm_term=fannie+mae+guidelines+for+appraisal+comps PDF link annotation
    • https://cdn.sqhk.co/wogokodu/bsNjdhf/dream_pop_bubble_pop_games_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493597/normal_601ad5856c036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470385/normal_5fe9a80aea5d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465687/normal_5ff5406712596.pdfIn PDF document text
    • https://pusenosate.weebly.com/uploads/1/3/5/3/135347115/7320038.pdfIn PDF document text
    • https://bewogataxatux.weebly.com/uploads/1/3/2/6/132695278/4560833.pdfIn PDF document text
    • https://dexulivixuwe.weebly.com/uploads/1/3/0/7/130739852/d4561.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/eaJjhcu/idle_death_knight_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/fjcgjjf/human_fall_flat_xbox.pdfIn PDF document text
    • http://labiluwewinedu.22web.org/90816233329.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/ohijdlr/super_mario_run_free_full_version_ios.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/9281764.pdfIn PDF document text
    • https://cdn.sqhk.co/tolademapati/hcWNTic/boss_fight_games_steam.pdfIn PDF document text
    • http://tekeriset.iblogger.org/muwaxakubopiluvamodopasiv.pdfIn PDF document text
    • https://cdn.sqhk.co/kapimetavis/jdfsdjh/nazuvomara.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/ULVEjiV/power_media_player_will_not_play_dvd.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvivemu/elGgege/19072586871.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawutanow.epizy.com/49479382984.pdfIn PDF document text
    • http://suxugumisa.epizy.com/85991591394.pdfIn PDF document text
    • http://rinonefor.rf.gd/booksmart_box_office_performance.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_off0000e09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09B 5432 bytes
SHA-256: 1ec0f851afd0f75fa0c62d6ec883b6344c2d4ff6f833a5bf2b777b863ea24f41
font_01_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 10284 bytes
SHA-256: 02cce6f0dddc41cf886f27749c98cd32b3f04494d9cdba6cf0efacce6fb1699e

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