Malicious PDF — malware analysis report

Static analysis result for SHA-256 d463aa2878e65365…

MALICIOUS

PDF

77.3 KB Created: 2021-05-03 22:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6702b06f264833649696e143093d657e SHA-1: c02356565c88ed7961ecbc03145e3f7f744966f7 SHA-256: d463aa2878e6536569b36a88a0e17355c92cb4d0be5dc31fba2de0e4ffc1d53f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the document's structure point towards a phishing attempt disguised as a technical document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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 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://maypoin.ru/strik?utm_term=how+to+learn+plc+programming+pdf PDF link annotation
    • https://fadurobudafeme.weebly.com/uploads/1/3/5/9/135959894/dupipisasabawon-xewisezus-kupusa-jevikikofote.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/4wK4jaw/3644219933.pdfIn PDF document text
    • https://sumokexopusoval.weebly.com/uploads/1/3/1/3/131378975/e061e9b1d9fa.pdfIn PDF document text
    • https://fikobovivinuzo.weebly.com/uploads/1/3/0/7/130739062/fexikuvobu-jukusuwigo.pdfIn PDF document text
    • https://punopofogow.weebly.com/uploads/1/3/1/4/131437229/3d51f8.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/ggdgdiN/youtube_rhymes_video_wheels_on_the_bus.pdfIn PDF document text
    • http://changely.club/bissell_powerforce_helix_turbo_rewind_bagless_vacuum_cleaner_1797_reviewshgsap.pdfIn PDF document text
    • https://cdn.sqhk.co/bawevabob/f5ihYii/tm_racing_dealer_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/kifavubivelo/icoidie/dosewe.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/pavuramuvosibeziko.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/1igjiaE/dj_mixer_player_pro_apk.pdfIn PDF document text
    • https://zamokofoviwikaz.weebly.com/uploads/1/3/0/8/130815095/nobagufadok-zubeleg-noxekumexoruj.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulatonupe/0jaUhbQ/camp_chef_everest_stove_manual.pdfIn PDF document text
    • https://dibulikari.weebly.com/uploads/1/3/4/2/134235408/suxujibas-xekobo.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/ghjcagd/68386139435.pdfIn PDF document text
    • https://cdn.sqhk.co/kokojisip/hE0geVF/logikediranefirafifawiba.pdfIn PDF document text
    • http://i12tws.website/hamilton-beach_32229r_22_quart_roaster_oven_chrome_blackm0ly2.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/a4fjik3/retro_arcade_game_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/agdbQyZ/sniper_runes_guide_ragnarok_mobile.pdfIn PDF document text
    • https://tekigeja.weebly.com/uploads/1/3/1/3/131384442/316421781.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/lixisariwulo/jezeroragevojedokev.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/vudedisawuwob.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/how_to_program_dish_remote_to_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/gokaxudesirabukun.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/echoes_of_an_elusive_age_trophy_guide.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_off0000f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 5352 bytes
SHA-256: 21860e0832ec8b7e6921c4b719f01ad89d77d0adc1eee6e4af47a07618a8a098
font_01_sfnt_off00010526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10526 9948 bytes
SHA-256: 2116460c2742258d1ab51a22804581fb3f2cdf16679f168febd8bd3077161e06