Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa44ed5217df7838…

MALICIOUS

PDF

116.6 KB Created: 2021-04-08 07:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 04e2999505bf93a89b605e348df74b85 SHA-1: 20e9ccf659bf33d7bc5d478701690d61fe6a72e2 SHA-256: fa44ed5217df7838f8b5ca2ac209e1cb387514c49e05e6af46adfe78a7159256
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one specifically targeting a search term related to 'reddit nuclear revenge cheating', suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on disposable hosting, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=reddit+nuclear+revenge+cheating PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456166/normal_600c1adc156d4.pdfIn PDF document text
    • https://totibevopomuv.weebly.com/uploads/1/3/0/8/130813722/bejasafoturejetezowo.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/BKThMgg/how_to_draw_signature_in_word_with_mouse.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/3971047.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/hcajchh/switzerland_map_cities.pdfIn PDF document text
    • https://xuwapitevakud.weebly.com/uploads/1/3/2/6/132682402/1845948.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/672ad5d3565040.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/oLFvljd/arizer_extreme_q_owner_s_manual.pdfIn PDF document text
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/58f92e6ee1741.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/bbIHsjf/walking_dead_season_10_episodes_how_many.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491925/normal_5ffded20df294.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://034b020c-baab-45d1-b3ff-c950d21f9178.filesusr.com/ugd/3c93bc_fcb0d84e2efa4a0c9307c83858c8ac9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/23622bd3-efd6-448e-b9b7-b4147f6e7226/domubilomefigimix.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/toto_toilet_seat_replacement_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729f3393-4ee8-46b2-8f99-0b891d21eb9f/essay_writing_examples_for_high_school.pdfIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_0e826589ae8b457ba2a133927a6bc208.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3051654-3b70-4477-91de-50c4255c6865/75027939177.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/5692221861.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/pokemon_roms_for_3ds_emulator_android.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_off00018913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18913 5092 bytes
SHA-256: 42a44de6f07f0a6741c661f2803ba145f59a33674fcb1c88c4c80a4ddeda75b0
font_01_sfnt_off00019a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A68 12596 bytes
SHA-256: 59d0be84806249cbf833086de8b35a4615eead7bc0160f95322d97c6d524cea2

Open this report in the interactive analyzer, or submit your own file for analysis.