Malicious PDF — malware analysis report

Static analysis result for SHA-256 4faa3a0593c7fe7e…

MALICIOUS

PDF

79.1 KB Created: 2021-03-30 05:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cca6f290a25651c161163c33e2df0d99 SHA-1: d9d237b50f3d2a18d7234e3ba38d1b71dcdbf94c SHA-256: 4faa3a0593c7fe7e29287e5b6360585e87a25cae7352b946af6dc77e77c7e9f1
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'hungry shark hack world apk' UTM term indicates a potential lure for game-related malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=hungry+shark+hack+world+apk PDF link annotation
    • https://cdn.sqhk.co/nugilatunu/ghfjjhb/music_notes_names.pdfIn PDF document text
    • http://rolevuses.iblogger.org/92025115718.pdfIn PDF document text
    • http://suvasemujodi.22web.org/how_he_loves_piano_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/dhhELzU/red_lobster_biscuits_gluten_free.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
    • http://kexemejalo.epizy.com/bumaketisunokugi.pdfIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_3d0284c8e3724835babcd4db50b76992.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/convertir_de_escaneado_a_word_editable.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_cd96de0c9a8d46848ace64e600b7cbb5.pdf?index=trueIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_89d5e838a3814e1282521c55d32717ea.pdf?index=trueIn PDF document text
    • http://budezeja.rf.gd/pafofima.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_ba834afb7ef54f839cb279b00dc5fdc2.pdf?index=trueIn PDF document text
    • http://teripanigi.epizy.com/definicion_de_estudio_de_mercado.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/dodecahedron_origami_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/nusazugazaluwefukawijeg.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_94557859f09a459f9758a792924683e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/fisariliwuzizes.pdfIn PDF document text
    • http://kaderuzaxaje.rf.gd/swann_8_camera_wireless_system.pdfIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_baf1f1230c8043f4ba325b67cbac4fea.pdf?index=trueIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_502b2c17de834b7a8535387fc4de27fd.pdf?index=trueIn PDF document text
    • http://putusalop.epizy.com/17342818170.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_off0000e764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE764 5192 bytes
SHA-256: abfe70a30da9cb98660f1787e44407f751d534f51668b899ccec1af9435d75f7
font_01_sfnt_off0000f901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 11516 bytes
SHA-256: c231208a959f0e26b3b0f4b5a392d56961ce42928328af26f830e36b51eddba1
font_02_sfnt_off00011fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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