Malicious PDF — malware analysis report

Static analysis result for SHA-256 7665bdae4ef147ad…

MALICIOUS

PDF

94.7 KB Created: 2021-03-30 03:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6320053d1556d5195897bdf3456d06df SHA-1: 8ab9c2c940bec5c3847a2573e5c7e97045a4f7cd SHA-256: 7665bdae4ef147adf330423738486a8328bc56eb99b39aca094081599b649174
186 Risk Score

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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/wix?keyword=stray+cat+simulator+apkpure PDF link annotation
    • http://lapitubemexidi.mywebcommunity.org/97939127640.pdfIn PDF document text
    • https://cdn.sqhk.co/jedepazisu/jbD9ggo/20525472505.pdfIn PDF document text
    • http://fezufizibum.mypressonline.com/nemututogerufudebuz.pdfIn PDF document text
    • https://talurepif.weebly.com/uploads/1/3/4/6/134603846/3da73f51.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/0b474629c0692.pdfIn PDF document text
    • http://vopezikililurab.mygamesonline.org/jewunogiserujovi.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/arduino_uno_45_projects_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/bozomixega/KdHgiPR/man_down_song_lyrics_rihanna.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/AWUbWhf/battleship_puzzles_warship_empire_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/fopeziriga/bOijjeK/car_crash_yesterday_utah.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/fhc5VLl/kakajaluwonopa.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/ibeh8ie/official_star_wars_lightsaber_color_quiz.pdfIn PDF document text
    • https://kalepadakib.weebly.com/uploads/1/3/1/6/131637037/lufosodepepimek-xapabobowe-sobezubeko.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/jjeNThi/xadumojigusuzaromoba.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/5geDij6/7231884542.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/tgcjfR2/81139206093.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/6c865e9d.pdfIn PDF document text
    • https://cdn.sqhk.co/noxutuvixi/BjeONgf/fatobilejowugubiri.pdfIn PDF document text
    • https://cdn.sqhk.co/tozerutiwezu/8haWLij/golden_gate_gardening_planting_calendar.pdfIn PDF document text
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/7478017.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/9hdinGL/83563474207.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/levovod/lawn_tennis_racket_buying_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/hp_ink_tank_wireless_419_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/26629439690.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off00010af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF0 5348 bytes
SHA-256: 7e7205918addab36748957ac401e527927b651bb9b1604cc41cc89270b987d4f
font_02_sfnt_off00011d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D08 5140 bytes
SHA-256: 3685e2e1c1f491757d4df11448a040d7a541f8f058c398fdd7457004d3d3719c
font_03_sfnt_off00012ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC3 11100 bytes
SHA-256: cb86f0b1f3380d3fdeb5ead6455d06fde8d39a3ee3fd53fa2fcbf441671e3eda
font_04_sfnt_off000154bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154BF 16348 bytes
SHA-256: 4da05b0578d34eab3ca8a2849713c096bf6d9f8a5d51f52bef1b33c921ec0663

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