Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ce03b7c85d34b5…

MALICIOUS

PDF

126.5 KB Created: 2021-03-17 09:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 450113133a2b21e79b3357e98c25493d SHA-1: bbf5d07d3a3088644bd85d1a6fc4933e3804407b SHA-256: 90ce03b7c85d34b5eb13abf4ff9df065cbdf0ac1f26df27d7f39a25e8dc8429f
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, and parcel deliveries to entice users. It contains a mass of external links, with one prominent URL pointing to a potential phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to facilitate further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://dafemum.ru/award?keyword=introduction+to+academic+writing+pdf+longman
    • https://dewifekezag.weebly.com/uploads/1/3/5/3/135313931/7046944.pdf
    • http://modezewop.mygamesonline.org/d_d_5e_character_sheet_writable.pdf
    • https://cdn.sqhk.co/jexozumumanu/FRhbBhc/golunawaroragoz.pdf
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/kexelor_zasumurokamu_zadazijesol_nevezotafiri.pdf
    • https://denagivar.weebly.com/uploads/1/3/1/3/131383646/zarofusod.pdf
    • https://rixikevepu.weebly.com/uploads/1/3/1/4/131408169/setigutuju.pdf
    • https://cdn.sqhk.co/rolileduvof/a9AiecN/invasion_of_iraq_2003_documentary.pdf
    • https://wokawopirajer.weebly.com/uploads/1/3/3/9/133999547/selazovopizimalomoni.pdf
    • https://cdn.sqhk.co/rubogomuweme/4hggige/bubble_bobble_2_game.pdf
    • http://gifinibufenatar.medianewsonline.com/dr_brown_sterilizer_dryer.pdf
    • https://cdn.sqhk.co/ropulufira/cjjt3s9/nopelokusolosiwotide.pdf
    • http://molufipet.sportsontheweb.net/cascada_de_coagulacion_sanguinea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jezaxojipevu/sawugetibusojavipuwo.pdf
    • https://s3.amazonaws.com/watajive/vebarupunukanixaz.pdf
    • http://visowazugib.rf.gd/covid_test_jobs_birmingham.pdf
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_a6d4818e00464c30bb7e79b16c051b2c.pdf?index=true
    • http://dapibudajemuk.atwebpages.com/the_iliad_lombardo.pdf
    • http://rogasubuli.rf.gd/rokukelenazufizewipote.pdf
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_77fe5ec8ac0741509937531c22415db8.pdf?index=true
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_8f72ad18c1524d0a8faa91ed3b5f24af.pdf?index=true
    • https://s3.amazonaws.com/dukexajuj/antimicrobial_stewardship_guideline_malaysia.pdf
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_52f00d7abd7341e0b0ded36693c3bc4f.pdf?index=true
    • http://kafudunafow.epizy.com/how_to_reset_iaqualink_wifi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b043.bin
c04fb63eb84ab805ca143f4d50dadc2a8b3271c387e6d31ee533d51922a4051f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B043 5328 bytes
font_01_sfnt_off0001c262.bin
72830e72ef06920da8ddc5b7b31b00b4e5b35868f8b68d97c5701d43a92defc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C262 12848 bytes

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