Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15a6d0cb1e488c1…

MALICIOUS

PDF

76.7 KB Created: 2021-05-22 04:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a35ade11db443f457638cd2c95121272 SHA-1: 1f591eb4b0ba4ee4283b374eb6f1664f8dfd3d6b SHA-256: f15a6d0cb1e488c14f4459c29406c6bbc39226d442e0203d0997242ad320bef6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://jacksth.ru/strik?utm_term=do+cycling+shoes+fit+true+to+size', is likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/strik?utm_term=do+cycling+shoes+fit+true+to+size PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419415/normal_6032aee381c99.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/tipak.pdfIn PDF document text
    • https://ninalekenapuboz.weebly.com/uploads/1/3/4/0/134017067/2112552.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/gilat.pdfIn PDF document text
    • https://pusudojajepi.weebly.com/uploads/1/3/5/3/135322366/wodivutaveno-dipuzapate-zaradusatami-somejinurelut.pdfIn PDF document text
    • https://fiwofufoneronup.weebly.com/uploads/1/3/1/0/131071066/320531.pdfIn PDF document text
    • https://xazepobuzu.weebly.com/uploads/1/3/4/5/134582826/najutopajus.pdfIn PDF document text
    • https://gupebuxoguwev.weebly.com/uploads/1/3/4/3/134381402/1335683.pdfIn PDF document text
    • https://kepigepejabuji.weebly.com/uploads/1/3/4/3/134315220/rilataf_pedafuzonatumer.pdfIn PDF document text
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/00cba9709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465685/normal_60465bbc348a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462982/normal_5ff0af1597280.pdfIn PDF document text
    • https://kobuvenaxoz.weebly.com/uploads/1/3/4/7/134762740/foxukatalet-nanuwenumeperod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_603744a9911e2.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/0e2130ec-26e0-48d6-81f8-18776a2d0b69/how_to_get_lockpicking_in_wow_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/consultant_monthly_report_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33bf5f55-390b-4cf3-841a-f2edb6999a94/38867577900.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/zenapanulubivat.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_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 5084 bytes
SHA-256: 9624d9b226d27db31dd2efeb3c2dce03cfd5701fd18e083cb6d3ee9036777a48
font_01_sfnt_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 10980 bytes
SHA-256: 0c038c6de5a0f219e7be8c6b11b3342c070a3c04b7399efab6055ffddd725936

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