Malicious PDF — malware analysis report

Static analysis result for SHA-256 67dfc99bb30f62be…

MALICIOUS

PDF

66.8 KB Created: 2021-03-27 18:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c5e83fdb28ac863c088a13d01b45fb9e SHA-1: dc16d2934f6ea9ea705a414323ba75a7962272f0 SHA-256: 67dfc99bb30f62be5b78198a656c77ffebc93a8c34f257759f599f05b211e506
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a manual, directing users to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=danfoss+ra+2000+manual PDF link annotation
    • https://cdn.sqhk.co/wafexumu/fhgibih/unchained_melody_sheet_music_musescore.pdfIn PDF document text
    • http://nubuxeki.scienceontheweb.net/tozetukukogofibapawuz.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/dibjeij/25389142396.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/XsjighC/83961276490.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/hetigjf/63278160734.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/15518224099.pdfIn PDF document text
    • https://puwevifu.weebly.com/uploads/1/3/4/4/134465284/negedokezixabu.pdfIn PDF document text
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/5824983.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/bhf4Ufu/63712687327.pdfIn PDF document text
    • https://tezifotunojoke.weebly.com/uploads/1/3/0/7/130776805/watibojet-kupolotogazap-gugivetelu-rukeko.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/uxia4ja/virus_estomacales_2019.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/87192286474.pdfIn PDF document text
    • https://cdn.sqhk.co/fovugemut/igFAche/sangharsh_bhojpuri_movie_video_song_tinyjuke.pdfIn PDF document text
    • https://cdn.sqhk.co/zebusukef/j4syhbe/taguponexuredofar.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/jjieie6/savefemetikamikemuduzir.pdfIn PDF document text
    • http://fidafevemikiwe.mywebcommunity.org/how_many_carbs_in_two_hard_shell_tacos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaminuzifibe.onlinewebshop.net/bupefowimosadibe.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/school_transfer_certificate_application_format_for_tc.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/legend_animated_text_in_video_apkpure.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_off0000c8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F7 5188 bytes
SHA-256: b5f72ea7f561494314e81be5ef724991948e0da439c581d8f87bc053f8cb5b28
font_01_sfnt_off0000da8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8C 10660 bytes
SHA-256: 7484fdab24649f9328e4b9b1aa17b742948e4cf76164896bde2738cdca24a90d

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