Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a0028117e1bbf4…

MALICIOUS

PDF

77.3 KB Created: 2021-03-23 19:37:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dfed9458a91f15d14b77b1fbbfbf4a29 SHA-1: 472f48717ac45f9aee6ac4811381d683d207ea9b SHA-256: 87a0028117e1bbf4b802a9e4b75e0eb25451875f064cf92c81bdfddf8952e6d2
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 0.9997

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=tutuapp+pokemon+go+download+android PDF link annotation
    • http://dressnbuy.com/another_brick_in_the_wall_pt_1_tabs9tcr.pdfIn PDF document text
    • http://umniashka.ru/cloud_computing_architecture04rky.pdfIn PDF document text
    • https://lefiluke.weebly.com/uploads/1/3/4/8/134887161/kasenakamawuva_rogikeposatabi_pamoro_bidufadejajo.pdfIn PDF document text
    • https://lujalidulosegex.weebly.com/uploads/1/3/4/3/134369289/3239019.pdfIn PDF document text
    • https://vasaxufunibax.weebly.com/uploads/1/3/1/6/131606743/xapiv.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/7502584.pdfIn PDF document text
    • http://front-glass.website/is_iodine_aqueous6y1dn.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/nikenuwanoz-kigen-tawazaned.pdfIn PDF document text
    • https://xolijusir.weebly.com/uploads/1/3/4/0/134016651/xakinebunu.pdfIn PDF document text
    • https://xorowime.weebly.com/uploads/1/3/5/3/135307705/31d1e1d3425.pdfIn PDF document text
    • http://salonlabs.xyz/62613086052r1vh7.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/9eabb0b53.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/julisujagelopa.pdfIn PDF document text
    • http://dkblogin-de.com/metformin_xr_missed_dosexr992.pdfIn PDF document text
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/c90cf97235f97a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_c30c3b8905ab45d9b09343b408982f7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/lords_of_the_fallen_achievement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/21568349546.pdfIn PDF document text
    • https://ce5d016b-e5fb-4004-af8f-35f61b829e22.filesusr.com/ugd/d7d7f8_f98cc1e3fe744d6cac1003b0866620c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/agile_project_management_approach.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B5 5204 bytes
SHA-256: 4e887fc38657652661e60734dd6e4bec8b02e8dcdc42c8674b1e51b701cb310a
font_01_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 11092 bytes
SHA-256: 29ce3c93479966a46ed240ac1a86f8bd310868732593a63df61c14f5d2745fce

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