Malicious PDF — malware analysis report

Static analysis result for SHA-256 decb18d03b201f88…

MALICIOUS

PDF

84.8 KB Created: 2021-03-21 01:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b5768dbddd61f1feb16890a4f9598cbd SHA-1: e4b9a8f52407d5c6cec1cb2917f1532beaf1fa3a SHA-256: decb18d03b201f880573d52c9e538b408dac2159739d6e01694dfb6e9e87012d
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs hosted on disposable domains, likely to distribute further malicious content or conduct phishing. The presence of embedded URLs and the heuristic identifying it as a link farm strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://jumiwimov.ru/award?keyword=after+we+collided+book+download+pdf PDF link annotation
    • http://world-wildshop.com/hustle_castle_arena_store5y72z.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/aTjijdN/first_aid_for_burn_blister_on_finger.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/jaigib8/trucs_de_grand-_mere_contre_les_crampes.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/GZihAji/silajobonegejenekarenitu.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/jiLAihv/12329082089.pdfIn PDF document text
    • http://dezimazokuxulil.mygamesonline.org/dark_souls_3_marry_anri_ending.pdfIn PDF document text
    • http://mx50off.info/59122404750kkx6t.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/QjdjdCl/43123330010.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/hjgfigx/rock_radio_stations_fm_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/Jjihggh/safujuzanemiwemofiteje.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/iheB8ib/julidafireferesofoxa.pdfIn PDF document text
    • http://jotitojimo.mygamesonline.org/arizona_family_law_self_help_center.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/hijb9v2/xuzedenifusaduz.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/jOhg5gf/63659977922.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hhbpqgf/halloween_decorations_near_me_now.pdfIn PDF document text
    • http://giveaway2020.info/jesus_is_the_center_of_my_life_lyrics_and_chordsac1so.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/lemixuzipulis.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/song_of_myself_10.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/BvgSCid/blackmail_odia_movie_hd_video_song.pdfIn PDF document text
    • https://cdn.sqhk.co/burajugi/aVyjZCd/banare.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/alice_in_wonderland_novel_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pilejifizodan.onlinewebshop.net/50207180438.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/61844555727.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/how_to_cite_lexicomp_app_in_apa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 5256 bytes
SHA-256: c89c5b3ff5745876e89b363f85732c0e93a8286053ebb21c9500e9784a38b2e2
font_01_sfnt_off00010796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 11148 bytes
SHA-256: 96b902fbc60553608e5736367ef93068a9ff8e718ed7b222fdd0460a49bb194a
font_02_sfnt_off00012dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFB 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf