Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f5991596ba8c9c…

MALICIOUS

PDF

82.6 KB Created: 2021-03-17 00:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fac0e31eb2442287df8594bced942c94 SHA-1: 7d6cf3f2b8e4ecbf607c53555b2551029c80374e SHA-256: 41f5991596ba8c9cec69b7c1b714cb7e618564eed75f2f4d4ee47ccc5f08ab95
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many of which appear to be part of a link farm designed to attract traffic. One prominent URL, 'https://maypoin.ru/wix?keyword=crossy+road+mod+apk+4.3.1', is directly embedded and likely serves as a lure for downloading a payload. The presence of a 'Download Now' heuristic further supports the phishing or malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=crossy+road+mod+apk+4.3.1
    • https://wamurereleveti.weebly.com/uploads/1/3/5/3/135392703/bizogenuvo.pdf
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/dosibimetiremum.pdf
    • https://cdn.sqhk.co/golizojuw/jciga7M/stickman_destruction_3_heroes_mod_apk.pdf
    • https://cdn.sqhk.co/ruvajuvewuj/ib1RfPT/archero_guide_farming.pdf
    • https://cdn.sqhk.co/pugijuzo/ghgjieL/starfish_story_quote.pdf
    • https://werukubafufu.weebly.com/uploads/1/3/4/0/134000234/fegoweretebevuke.pdf
    • https://fegowudabe.weebly.com/uploads/1/3/1/4/131438077/kemenadalejakab_nemupejige.pdf
    • http://luminar3-download.xyz/generate_battery_report_windows_8etih0.pdf
    • http://zoneeuro.pro/free_pictures_of_flowers_tofn9ql.pdf
    • https://cdn.sqhk.co/tumakakebi/l5Cgjhd/lullaby_songs_to_put_baby_to_sleep.pdf
    • https://woxudozu.weebly.com/uploads/1/3/6/0/136042517/sisezi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/98c08b6b-ed94-4bed-93b6-cbb40e5c0e3f/62243931592.pdf
    • https://uploads.strikinglycdn.com/files/d19fb0b8-bf8c-4b4d-a1e3-9517f033475a/76273672716.pdf
    • http://vumopigaw.epizy.com/46733633905.pdf
    • https://uploads.strikinglycdn.com/files/a18c01d7-dcda-4967-885e-5f3f56bafbe9/41620227768.pdf
    • https://uploads.strikinglycdn.com/files/ebdbcd5a-b754-4456-993b-a68688263140/california_math_expressions_common_core_kindergarten.pdf
    • https://uploads.strikinglycdn.com/files/9b17905b-0f53-4528-a025-23f642d99644/pasefisirimaziwanikasotiv.pdf
    • http://dixadenidufudu.epizy.com/homestead_dam_betsie_river_fishing_report.pdf
    • http://kexeban.rf.gd/oven_roasted_potatoes_nutritional_information.pdf
    • http://goxoloxegaw.epizy.com/inference_worksheets_2nd_grade.pdf
    • http://vejawotivifima.rf.gd/greenhouse_effect_and_global_warming_worksheet_answers.pdf
    • http://kafopazam.epizy.com/8808947062.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb9.bin
f65520f6ef60da506e447a0df346607fe9f9f8002dc778b9ff4ef778b94c18ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 5036 bytes
font_01_sfnt_off0000fee9.bin
368096468715809f346ac78eea485b6ff6d16d6a3e9ccd7e331bba6bf4c17835		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE9 14668 bytes
font_02_sfnt_off00012d55.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D55 4324 bytes

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