Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc97b6f55fb314e…

MALICIOUS

PDF

70.4 KB Created: 2021-02-21 19:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4b32a59ae5180f84d7c6af50cce810c4 SHA-1: ecd77aa4ad3929c807271366aca31b651b437cac SHA-256: dbc97b6f55fb314ed040525912d0fa9706b9c110a73e91f0bf1ff9105ff638f7
186 Risk Score

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 designed to redirect users to potentially harmful content. The document body, though partially corrupted, contains text related to academic books, likely a lure to encourage clicks on the embedded URLs.

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://baarspo.ru/123?utm_term=health+behavior+theory+research+and+practice+5th+edition+ebook PDF link annotation
    • https://cdn.sqhk.co/zuzikewed/hPxksiL/history_of_south_asian_literature_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/97ieUge/95189712812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_5fd85b8091a37.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/gg4heSd/vapudepujiba.pdfIn PDF document text
    • https://xagajanum.weebly.com/uploads/1/3/4/5/134599721/nonafuforozexagad.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/7dd35ab350c.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/iEhfhff/samsung_galaxy_s10_plus_stock_ringtone_download.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/fogadoz_muxubabagole.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/sYgcWjc/marco_s_pizza_bowling_green_state_university.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxogego.epizy.com/91853808372.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/civilians_in_armed_conflict_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/music_event_poster_templates_free.pdfIn PDF document text
    • http://ridexinawaje.epizy.com/61925247736.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_off0000d5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A0 5612 bytes
SHA-256: d225c6dbe8a36290f8823bd08e77cad153cb803be159e63cedaff39bbe8deb1f
font_01_sfnt_off0000e8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AE 10516 bytes
SHA-256: b32891b0172a7bfd7f531e5736ea7080ed6b162b9e227d43a8ddccef59877961

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