Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c80bac80cb467d…

MALICIOUS

PDF

92.2 KB Created: 2021-03-31 23:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e1ca2645d0ec05889d2db3f463667b4b SHA-1: a1b1a7e7b72ddf3eda252a41e8ba953f8c468bfa SHA-256: 36c80bac80cb467d21caebc180d97a37c12fde26894c1f4f46fd1c8beaa5beab
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'resalured.ru', which is suspicious. The ClamAV detection and ML classifier also indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the nature of the link farm suggests an attempt to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://resalured.ru/wix?keyword=blacksmithing+vanilla+wow+guide PDF link annotation
    • http://mavigawika.scienceontheweb.net/how_to_program_my_universal_remote_to_my_dvd_player.pdfIn PDF document text
    • http://uscovidcharts.com/gamesaxegejegewuritrsrve.pdfIn PDF document text
    • http://obzorov.site/astor_piazzolla_oblivion_sheet_music_freerdgbt.pdfIn PDF document text
    • http://walletelectrum.buzz/98438979754mfihy.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/alhazen_book_of_optics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kovezodepugov/likinutukaj.pdfIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_206b4e1d78484623a2632910e1f2c317.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/chikku_bukku_raile_telugu_song_free.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/skf_cylindrical_roller_bearing_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/1080p_60fps_bollywood_video_songs.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/68333471782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ac294b-c71b-4f5f-b921-1ba3600fed74/57551207688.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/along_for_the_ride_movie_2000.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/17185479154.pdfIn PDF document text
    • https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_e4056926db77426a969d0c51c973dfc2.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_c62f49c64d98433684714e7f132cfa55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/tunumotadoxodonupabaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502c1d01-165d-4515-8ea0-00cd805bdf86/amazon_presto_profry_deep_fryer.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/how_many_midichlorians_does_ahsoka_tano_have.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/26519878841.pdfIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_416c040c4a614440bddde6c8472dde5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09337cf5-42d9-42a9-8edc-74ff96ea1f8a/solidagorusoxifu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 5404 bytes
SHA-256: 198f9de25c305511819c6785122838b9df58a94a7f839b43a2ce22234717b004
font_01_sfnt_off00012ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBE 11176 bytes
SHA-256: aa9e63bc736ee34f5f2167bdf083997a5157c97c88573ee490f6adc1f589d7b6
font_02_sfnt_off000154cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154CB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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