Malicious PDF — malware analysis report

Static analysis result for SHA-256 71068e8ede9b0954…

MALICIOUS

PDF

101.9 KB Created: 2021-05-24 05:35:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0f04a7a5144d98e1c369ab440aa63358 SHA-1: dc18280204745a699cf6fdc2c0dc91fa78bccf77 SHA-256: 71068e8ede9b095433658d5ab478a466e8e143170e2f3cf61c97b27b474d7558
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 0.9990

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://soxebez.ru/strik?utm_term=seigneur+nous+arrivons+des+quatre+coins+partition PDF link annotation
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/8387802.pdfIn PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/nafasojavalodepovupi.pdfIn PDF document text
    • https://fiwebafifike.weebly.com/uploads/1/3/4/8/134885554/72e4771a.pdfIn PDF document text
    • https://nuwuzeparagagux.weebly.com/uploads/1/3/4/8/134883197/9c82194ae66c.pdfIn PDF document text
    • https://fevufimekosiso.weebly.com/uploads/1/3/1/1/131164497/gefefalulobije.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5fcc4438efc6d.pdfIn PDF document text
    • https://sapezirotup.weebly.com/uploads/1/3/4/5/134576964/mebekatijevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_5fdc20ae3f44f.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/5160401.pdfIn PDF document text
    • https://feverawujebuv.weebly.com/uploads/1/3/5/3/135314909/pijose_rosonoxipi_wedavub.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/db87a15b7c9c1.pdfIn PDF document text
    • https://rejonogatu.weebly.com/uploads/1/3/5/3/135392998/saxigizosiz.pdfIn PDF document text
    • https://jasugupaxawuz.weebly.com/uploads/1/3/0/7/130740610/68aa3d54b2609.pdfIn PDF document text
    • https://maduvifodowemo.weebly.com/uploads/1/3/4/6/134692972/widudodaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pesetufavo/chakra_books_best.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/christmas_dinner_place_cards_template.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_off00010ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED4 6704 bytes
SHA-256: dc5d415c5d5d098f7670d471bd5d60f0902fa5a6d994d50837f16a8aa06d6a45
font_01_sfnt_off00011f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F91 5380 bytes
SHA-256: 56ecc38a7d0875aca7ed4cc7ca73786f243c0383ab6ac5b06863327f1e753b76
font_02_sfnt_off000131e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E8 15676 bytes
SHA-256: e83d1610b9c17ab475e4c3a301e76ae16300e4e7a6618a0e7b850cd0d66c4c42
font_03_sfnt_off00016325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16325 16400 bytes
SHA-256: a8bff12230f87da846dfea7f511d90cb6f4f76b0bc4c61c1f0d827017f78620c
font_04_sfnt_off0001794f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1794F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c