Malicious PDF — malware analysis report

Static analysis result for SHA-256 d316189b40073154…

MALICIOUS

PDF

78.1 KB Created: 2021-03-14 20:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa5d28c406c84fce242bc008d661d906 SHA-1: d11cf1f4634302fdefebd7364bfb7cdf400925a7 SHA-256: d316189b40073154a9e5f66d625922573cf0c1d6e5c94bdea19e2355f18a789c
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a technique often used in SEO link farms to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the primary goal is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://jacksth.ru/strik?utm_term=how+to+learn+python+scripting+for+beginners PDF link annotation
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/8244760.pdfIn PDF document text
    • https://cdn.sqhk.co/kosibowo/geijyia/57838204996.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/gktnOsj/matim.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/ighDZ3h/ninja_dashing_apk.pdfIn PDF document text
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/1148657.pdfIn PDF document text
    • https://naleletilasimoz.weebly.com/uploads/1/3/0/9/130969891/139d7f3c636b6a.pdfIn PDF document text
    • https://veborejekeraleb.weebly.com/uploads/1/3/4/4/134480613/285380a4b665e9.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/chdENgh/10596484931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zosevid/can_i_use_my_phone_as_a_hotspot_with_consumer_cellular.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/21969005992.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/how_to_pass_road_test_in_nyc.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_606d9c8eae8f43e89e978e2f8bdff088.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/how_to_use_finite_element_method.pdfIn PDF document text
    • http://zoxogonewa.rf.gd/what_fast_food_places_give_you_free_stuff_on_your_birthday.pdfIn PDF document text
    • http://sobegomogi.rf.gd/49668149065.pdfIn PDF document text
    • http://laneladokeza.rf.gd/minn_kota_trolling_motor_battery_charger.pdfIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_971ecae4acd34449912d49f6c93ece01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legipalofi/spectacle_visual_culture_definition.pdfIn PDF document text
    • http://kipafiperugava.epizy.com/21577550316.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/6680070048.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/zonogi.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_4bbfba08e39f457ab375fa093ba0cded.pdf?index=trueIn 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_off0000f132.bin
9b7f2b9980eb4554c5efac4ae68f026065e22d157c896d80d726fff20cc369ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 5572 bytes
font_01_sfnt_off0001043a.bin
4db4a03a20b789eb94d07e236be364b42a55c67361d7c9f735ab9e2de4ab83ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 11168 bytes

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