Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85b51bd310d0820…

MALICIOUS

PDF

68.5 KB Created: 2020-11-18 20:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02081fd31e70a746bd135f866aca84bb SHA-1: 436dc0057e64f8946bb5fb511e5811f08c55e7ca SHA-256: e85b51bd310d082001b7f19aa411e9367f13feb2d1940ea989908f745db4761a
252 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to various external resources, including a known malicious redirector. The document's content and structure suggest a phishing or malware distribution attempt, masquerading as a free download. The presence of numerous links to disposable hosting and a specific redirector URL indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gettraff.ru/strik?utm_term=bookkeeping+for+dummies+free+download
    • https://rasiporimi.weebly.com/uploads/1/3/4/6/134614798/7626614.pdf
    • https://nabesoke.weebly.com/uploads/1/3/4/0/134042749/7063400.pdf
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/jusudijox.pdf
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/puvowemu.pdf
    • https://xemawegomefere.weebly.com/uploads/1/3/4/7/134736207/nalebet.pdf
    • https://risebezisenozo.weebly.com/uploads/1/3/4/3/134375164/b8b4bcc58.pdf
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/mozit.pdf
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/7237958.pdf
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/zujuko_davupab_fixadolotuzeja.pdf
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/tofinesowekakinob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dazinibonofobi/proform_manuals_free.pdf
    • https://uploads.strikinglycdn.com/files/e5c09322-9331-46d6-946d-799fe63e3fbb/pixitusigoj.pdf
    • https://uploads.strikinglycdn.com/files/efe38673-73ec-4cba-b2be-d9cecba41408/reading_comprehension_b1_level_to_print.pdf
    • https://s3.amazonaws.com/kikunojulejuj/6649486653.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb4.bin
2aae51c5ed46b178d487bc838ecfa3571f54512dfdc974e7cd652c33e70e9809		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB4 5564 bytes
font_01_sfnt_off0000e2ab.bin
b14bbbef56c3d56ea004bbca77288265503d218274b3a5ccb5adb12e6504d0e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 10168 bytes

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