Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4f61f1c68abec1…

MALICIOUS

PDF

77.7 KB Created: 2021-05-26 02:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 792f5bce91799a6bb26485b3223e1463 SHA-1: dda1b7fc44c2dab17f49d1e411c2fc9edea63c1d SHA-256: bb4f61f1c68abec12d48da370a33aea183a69fd2a4be6f8f6422a00aefe69be6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier. The heuristic 'SE_MFA_LURE' indicates it's designed to harvest credentials by tricking users into approving MFA requests or entering one-time codes. The PDF contains a link farm with numerous external links, one of which is `https://fokemale.ru/strik?utm_term=can+you+use+ps4+camera+on+obs`, likely leading to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://fokemale.ru/strik?utm_term=can+you+use+ps4+camera+on+obs PDF link annotation
    • https://sewowifef.weebly.com/uploads/1/3/6/0/136082850/mewip-fujazikibotutop.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/8235997.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/11f843165dba.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/jupufisu.pdfIn PDF document text
    • https://pidolanapeg.weebly.com/uploads/1/3/0/8/130813957/xuwugiwipuforami.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/jused-kujovopiw-zevuf-zozetuso.pdfIn PDF document text
    • https://bikekifo.weebly.com/uploads/1/3/5/3/135304891/9744038.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/zikox.pdfIn PDF document text
    • https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/zilawisemoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f116c95-898d-4773-9d08-ff8ecfde3b23/13028664516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a78052-18c7-4e33-855a-2183b11ba952/fovenodurotize.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/61712492398.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/bujavejitexabor.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/adobe_reader_9._1_0.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/commonly_misspelled_words_middle_school_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f438c1-631c-4574-bda2-543dd5173b1c/kenmore_stacked_washer_dryer_model_417.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/zopelilipobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c1d585-9fa4-4f7b-b211-aebd6f17b2c8/addie_model_example_lesson_plan_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/words_have_power_read_a_banned_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113f1afa-d4e8-4476-bc28-d539067ae8b2/local_area_network_settings_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/november_schedule_for_tcm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/303d6784-7c57-45a7-a3a4-a27f2dbea346/61407783363.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/maplestory_kanna_guide_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1dffdf6-a5cf-40df-8596-7efb2bef41c2/chariots_of_the_gods_book_author.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/gagavegata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa726d32-07a2-4e9b-9c06-0748ce5e57fb/10831852179.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 5284 bytes
SHA-256: 2c736e0c16242e7adfc57add2a4fd2ece8f96e9a710a4c957156c273b4d63dea
font_01_sfnt_off000104f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 10668 bytes
SHA-256: 4f024bc1ed9f4296daa8ef102887e519f78dd09152f8a93b1a4ee37581bc278c