Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9b5655fc94b9b9…

MALICIOUS

PDF

77.8 KB Created: 2021-03-30 05:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 014b99a27c168d8f96a57e05b0692d0e SHA-1: 8f02eaaa57035f582218b674e767efa3dbfe2e0f SHA-256: 2e9b5655fc94b9b9b5199eccd322f3bf2a3432e70603c965198e2960fd8820f5
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. ClamAV and ML heuristics identify it as malicious, likely a phishing or trojan delivery mechanism. While no scripts were explicitly extracted, the PDF structure and external links suggest an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=forensic+report+structure PDF link annotation
    • https://cdn.sqhk.co/baxewoxevum/dggjaja/agenda_template_for_meetings_word.pdfIn PDF document text
    • https://tumafikajenama.weebly.com/uploads/1/3/5/3/135326798/fudajenozebofa.pdfIn PDF document text
    • http://stakingyfi.com/end_of_the_world_song_remakehrkrv.pdfIn PDF document text
    • http://safetymirrors.xyz/12200408755ov8mh.pdfIn PDF document text
    • http://micrometer25bill.site/how_do_i_balance_my_lg_top_load_washeraz3pb.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/fKl4Eam/monster_battle_royale_sneak_attack_squad.pdfIn PDF document text
    • https://cdn.sqhk.co/kutogudofi/ha9FjaK/5694375248.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/jhhcgft/6240656873.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/icfieJ0/mini_motor_racing_game_free_download.pdfIn PDF document text
    • http://2220202.ru/24090231162thwaa.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/9J1Wwjb/nafudomefowigakujepa.pdfIn PDF document text
    • https://cdn.sqhk.co/semoxumid/ijbSib6/70847456087.pdfIn PDF document text
    • http://romeita.space/home_network_switch_before_routeratx5h.pdfIn PDF document text
    • https://jozifopavix.weebly.com/uploads/1/3/4/3/134355896/nomejutajosa_kixulagogutirom_tikuvexa_javigafo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maxegore.epizy.com/ximezirekutogena.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/how_to_use_finite_element_method.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/what_is_assessment_tools_examples.pdfIn PDF document text
    • http://posufimiru.rf.gd/239406087.pdfIn PDF document text
    • http://wutodabegaf.epizy.com/allworx_phone_label_template.pdfIn PDF document text
    • http://fenulujexita.epizy.com/2729111450.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/xubasagimevakiburumosite.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_off0000f41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41D 4640 bytes
SHA-256: 6d7a2d03c3dc3e094c9247b183778ed888bcced4d4ddba5518002168b3060806
font_01_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 11164 bytes
SHA-256: fbe702b4aed4f93ef01410f1cf8ece639b3012e795829728e99427e88d3f5890

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