Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32ecd29ff9a0ebf…

MALICIOUS

PDF

89.6 KB Created: 2021-04-07 10:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 83fb38b21b4e48ad354d1635b3456f47 SHA-1: 2567b634b7d4bfafafe098537b5a796c12a339de SHA-256: a32ecd29ff9a0ebfcd550068672d43822985dfd1b01955ee49ad80b38fad16a1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains heuristics indicating it is a link farm on disposable hosting, designed to lure users with the promise of cracked software. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing and potentially trojan delivery. The document body, though heavily corrupted, contains text fragments related to "Teamviewer" and "crack", reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://lozipotod.ru/123?utm_term=teamviewer+10+mi%25E1%25BB%2585n+ph%25C3%25AD+full+crack PDF link annotation
    • http://rrrrkkkkk.space/luwuniwarafil8o4fe.pdfIn PDF document text
    • https://kunobozawi.weebly.com/uploads/1/3/1/4/131453145/1182797.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/hgieHr2/bowmaster_arrow_fighters.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/hnieibw/bolepidemen.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://dosodufixelo.weebly.com/uploads/1/3/2/6/132682620/wogonizonenun.pdfIn PDF document text
    • https://dibumofum.weebly.com/uploads/1/3/5/3/135313591/4038811.pdfIn PDF document text
    • http://dnepr24.info/zivezikasugfuzuo.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/Njjjd17/origami_paper_near_me.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/5241784.pdfIn PDF document text
    • https://cdn.sqhk.co/gisefezuzif/jjhgUji/switchme_multiple_accounts_full.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/af198b27-9ad9-4ad1-bd5b-14856b2f9766/lopi_wood_burning_insert_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/cadence_tool_for_vlsi_design_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa320de4-dea9-4615-89d7-5575cb103907/kililerofosiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7bb0216-6f3d-4d01-b73a-005abb539bca/60318358119.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/gender_reveal_scratch_card_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed596f1-06d0-4ed0-b99e-ff6099cbb0ff/84641297864.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_off0000dc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 6832 bytes
SHA-256: 01ac34376b7092400a12f9c5b46029046d686b565a1181b560d79e3eb0283013
font_01_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 5752 bytes
SHA-256: eedb22730ed3a431ef90a403ebadc4231cfe45481691bbe12634cb5d449c836c
font_02_sfnt_off0001009e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009E 4708 bytes
SHA-256: 143f6aa04bf03eb44ebbd420537c7abbf9b94372b23497649a55686df4331d0b
font_03_sfnt_off00010f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2F 21716 bytes
SHA-256: de7a3245ef87d41e457a3f4a8cba5addac2fbf3155c0eb54925eb71371c16ac4
font_04_sfnt_off00014000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14000 16256 bytes
SHA-256: 09eac85525e4e31cb6fd69fe554baf0bff05716ac67dd70b39d45d87f784aeaf