Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f6442cf3de25bf…

MALICIOUS

PDF

74.3 KB Created: 2021-02-18 05:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4a6a704c5d74bf690a41978329881d24 SHA-1: a3b040d0ab28be0e43503090068f3b5745a85e53 SHA-256: 49f6442cf3de25bf1cf0fae76505472bd60126293cb178a901e4c16a6e8433e9
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 SEO manipulation tactic to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=bissell+proheat+pet+carpet+cleaner+user+manual PDF link annotation
    • https://fitinunajixir.weebly.com/uploads/1/3/1/6/131637477/25b8d734aa73d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403121/normal_5ff194c62e2cc.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/dnjgage/the_best_radiohead_songs_of_all_time.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410956/normal_5fe0714bc951c.pdfIn PDF document text
    • https://kijujiwovijuk.weebly.com/uploads/1/3/1/4/131453096/tavubusozo.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/VnmigFp/red_alert_2_remastered_walkthrough.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459164/normal_602ab0c0287c6.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/kkmJjd3/48286406844.pdfIn PDF document text
    • https://magirakikepemun.weebly.com/uploads/1/3/4/0/134000039/tiwamivunovad.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/2e5388c.pdfIn PDF document text
    • https://najonetawo.weebly.com/uploads/1/3/4/5/134522785/43be6727c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/gartner_magic_quadrant_report_for_workload_automation.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/53068564776.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/85929609642.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_off0000e6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B2 5224 bytes
SHA-256: f4ccbf72ffecd40a1782bedc89315eacf3b3fe642f791af5226d25470496d1d4
font_01_sfnt_off0000f848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 10420 bytes
SHA-256: 9e66a57687bc82656137a6f4393db673697e6a1b793140cde9f6809a22889d13

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