Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9b0e47468c2569…

MALICIOUS

PDF

72.5 KB Created: 2021-01-06 03:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 17a154fe62450ee8080b741331368fcb SHA-1: 77ca9781b26de1b3f356bfa20db46ed9ada47f54 SHA-256: ba9b0e47468c256958efb01a9c65ddf8a354890bd825fe18483e3aba79494ccf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=b+pleated+sheet+vs+alpha+helix PDF link annotation
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/taduzo-nosapenul-nezifoxetabo.pdfIn PDF document text
    • https://zodukoweferu.weebly.com/uploads/1/3/1/0/131069906/9eae3e6.pdfIn PDF document text
    • https://vimudizod.weebly.com/uploads/1/3/4/6/134632239/putekigalera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450733/normal_5fe4778a4708d.pdfIn PDF document text
    • https://riwinuwozobama.weebly.com/uploads/1/3/4/8/134868589/xigabasejupopezebiwa.pdfIn PDF document text
    • https://mulanazujejuxu.weebly.com/uploads/1/3/4/8/134855463/zopasozi.pdfIn PDF document text
    • https://zuzumapi.weebly.com/uploads/1/3/4/3/134344149/fa16a20.pdfIn PDF document text
    • https://dodixokufeji.weebly.com/uploads/1/3/4/5/134597977/4055097.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/2796375.pdfIn PDF document text
    • https://dajexave.weebly.com/uploads/1/3/4/3/134352807/6db0593bd8b9e.pdfIn PDF document text
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/61eaa3d5a22a0.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/ad0f3ddd-27ef-4e9a-b9ba-ed0837046649/48971424155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3cbe87-2a46-466f-b7bd-5e0052f1d95d/call_of_rangers_duty_mobile_3d_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ae3e01-3437-4d28-9eca-6f71a485f87c/likozukogamuwom.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_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 5128 bytes
SHA-256: 618b10630f4cfaa5340bdbc231572db7440d08ee447d06a82cc38234bf2f1cf4
font_01_sfnt_off0000ef01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF01 10644 bytes
SHA-256: f7f544771de82b954ea37333d0e2b2240b8ffe7532274ab4625da8e8752388f9

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