Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bef9b7c9579363…

MALICIOUS

PDF

101.3 KB Created: 2021-04-06 02:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cc7fa58eef4f362c74d0e874bbccc818 SHA-1: 90b16fa0ad3b3d1a3b3eaa66f6ae160eaf59a15b SHA-256: f8bef9b7c95793633086090d6ad1febd4b69ae45d347992ec6f9ead2207a4685
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a LOLBin command-execution lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://golowaki.ru/aws?utm_term=what+is+the+book+50+shades+of+grey+about PDF link annotation
    • https://cdn.sqhk.co/nubenirosife/hcniT0c/34320690703.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/6sZgfHl/19499659637.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/JClhahe/family_chantel_alejandro.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/jdjihff/37457746844.pdfIn PDF document text
    • https://cdn.sqhk.co/jefigujaxev/hiicOjd/monkey_mask_plant_leaves_curling.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/hSjgzvg/52425041089.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/ggechn8/75023742870.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/kipaselofuza/hh2DhaL/12379790427.pdfIn PDF document text
    • http://zuberisuxivaki.scienceontheweb.net/81105713137.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/hjfqieU/ravensburger_puzzle_1000_christmas_limited_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/hSjgzvg/524250410In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9239dd0d-0059-4729-88fa-d0dd07a3f8df/28596381287.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/mecanica_vectorial_para_ingenieros_dinamica_10_edicion_hibbeler.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/the_woman_in_the_window_book_into_a_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe59caf7-d0ac-45c4-8d1f-775588d02852/48930855221.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/jim_stoppani_shortcut_to_size_meal_plan.pdfIn PDF document text
    • http://vedixemalirugi.atwebpages.com/garmin_fenix_2_gps_watch_renewed.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/husky_8_gallon_air_compressor_oil_type.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/why_fat_face_skinny_body.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/8ac15169-8261-43f0-a8d3-b6448e956f0d/86236945306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0a58ea-ec0f-4762-a798-ea774ede6e23/polk_audio_psw110_subwoofer_speaker_reviews.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/gibelateke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde98b79-5b72-4bdd-86cb-5046c8827513/dork_diaries_12_book_collection.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD9 5724 bytes
SHA-256: 5c0cf58584c19837849f9347cc03d0fcedc8bc7b2f3c5542e40607bcbc847ad6
font_01_sfnt_off00016063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16063 11544 bytes
SHA-256: 706cf18ea37d8f8d72a184b9d3ff25c8bfb2923c4809f50fcff41ae50639b989

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