Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ff799e3dcb2cee…

MALICIOUS

PDF

92.0 KB Created: 2021-02-11 06:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 62af47ad1c994b27621d503f3845ffa1 SHA-1: b741d8fe337a8e3add7d2eaa00dff1d078181cfb SHA-256: 35ff799e3dcb2ceee0e97e1b6f31f6b92eb24a8b879d92dd11736b135d68a6f1
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The presence of numerous external URIs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=jamie+eason+day+2 PDF link annotation
    • https://cdn.sqhk.co/zupololano/g5gc5jg/drive_in_movie_theatre_orlando.pdfIn PDF document text
    • https://gaditefu.weebly.com/uploads/1/3/2/7/132712385/c73846ea3a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_601bde57dc8b2.pdfIn PDF document text
    • https://mafadojidakiwo.weebly.com/uploads/1/3/1/8/131871721/tivonudozi.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/hhjVjjb/snap_assist_win_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387925/normal_5fde50ed83b46.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/ojfZWii/rerutubibasojasaseba.pdfIn PDF document text
    • https://cdn.sqhk.co/vakusukereju/hdhfzHp/84898707567.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_6009664552682.pdfIn PDF document text
    • http://digitalmedialit.com/802222317670p2dn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368229/normal_600758c176218.pdfIn PDF document text
    • https://jazazigiw.weebly.com/uploads/1/3/1/3/131398077/7101335.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vevojadiren.epizy.com/xenajat.pdfIn PDF document text
    • http://rutenodisekorin.rf.gd/adobe_acrobat_xi_pro_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/ffxiv_innocence_extreme_guide.pdfIn PDF document text
    • http://zotibulavozixu.rf.gd/free_template_powerpoint_animasi.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/24431887147.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/gaf_armorshield_ii_data_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00F 5068 bytes
SHA-256: 4c5d0287a676cafc697491d9b52caedf202cdc3b90f369f00e7a281e445f1ea1
font_01_sfnt_off00010141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10141 13892 bytes
SHA-256: 114888279fffcab01a836355df34cc4a7eb2eeab93525a5b8d418288f86ccc32
font_02_sfnt_off000127f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F0 10948 bytes
SHA-256: ed97a6361ec5436992ab7f17c3bdcbb1efbb5b8c00ab4e8cc1a84dcef37b23d1
font_03_sfnt_off00014d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D86 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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