Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c5db90c05ecf6a…

MALICIOUS

PDF

92.8 KB Created: 2021-03-29 05:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 132a8d0ee2a2e4647b2358bbb7ef34a2 SHA-1: d81b7cc36ce2e41777dabee1c078cf96b1d0c68a SHA-256: 86c5db90c05ecf6aa91c7794de8ff093c64a6fb9a0f848989d26d85f3098ff17
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs suggest a link farm or phishing campaign, aiming to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://dugedepap.ru/wix?keyword=best+manual+die+cutting+machine
    • https://cdn.sqhk.co/togixulala/ghkieUJ/85227815391.pdf
    • http://itanah.space/wenixekinikabisolibezwfhs5.pdf
    • http://milky-rp.space/buzzer_beater_basketball_playswcd9u.pdf
    • http://photoforce.ru/3186556915210icv.pdf
    • https://cdn.sqhk.co/surikuzezun/JoijibP/herpes_simplex_type_1_icd_10_code.pdf
    • https://static.s123-cdn-static.com/uploads/4415951/normal_5fee82d3f2603.pdf
    • https://cdn.sqhk.co/nudorijoraka/jgdicuw/happier_piano_sheet_music_hard.pdf
    • https://cdn-cms.f-static.net/uploads/4420597/normal_600f792c0a1ca.pdf
    • https://cdn.sqhk.co/fipimomozuk/j9gi5gd/auctiontime_app_apple.pdf
    • https://cdn.sqhk.co/zogowefu/gdhb5RV/meat_chickens_for_sale_online.pdf
    • https://cdn.sqhk.co/budajawisore/5jeijeX/sunrace_12_speed_cassette.pdf
    • https://static.s123-cdn-static.com/uploads/4486221/normal_5fc9e85b506f4.pdf
    • http://silokegawup.iblogger.org/android_chess_setup_position.pdf
    • https://cdn.sqhk.co/zebimapajod/jfUiihi/vazudabubarej.pdf
    • http://effektzhizni.ru/pusuzutobazuzvzms.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://waxusumuguk.epizy.com/tamil_new_cut_song.pdf
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_08a97f680a6042048efb484f8466ccd0.pdf?index=true
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_88ae6fd8c59045589d8041d3fa86ef0e.pdf?index=true
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_2cdec7cf355a4d0c83a75a2b8935bc40.pdf?index=true
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_7dcb22ccc7954df6a6074536436d8290.pdf?index=true
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_b03d81d3e06c4d4c86c9885e6214083f.pdf?index=true
    • 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_off00012edb.bin
cfea6ec8231e46bdf39e7e38f46cca53dec73e52c858ffd414d3fd95cb6561ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDB 5308 bytes
font_01_sfnt_off000140be.bin
6a9846f61ac099974cd68844e53cc83fbd1255f0458d67237131c1572ac8f921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140BE 10944 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.