Malicious PDF — malware analysis report

Static analysis result for SHA-256 615fc0cc095efc40…

MALICIOUS

PDF

89.5 KB Created: 2021-03-19 14:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b83c23bbb0401a0d536f47a45c3f332 SHA-1: 7a2ec656f1f9b20959a2ee6ec46b9749bb18aa8a SHA-256: 615fc0cc095efc4016ea39ad338ce4f34381b772c961c9a49241100333508333
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to SEO-optimized content, suggesting a link farm or spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or redirecting users to malicious sites. The document body, though heavily obfuscated, contains references to a carpet cleaner, which is likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://dafemum.ru/aws?utm_term=how+to+use+hoover+carpet+cleaner+spinscrub+60
    • https://cdn-cms.f-static.net/uploads/4373520/normal_60407e5b1d843.pdf
    • https://telapawuwa.weebly.com/uploads/1/3/5/9/135964826/2af33515a67a.pdf
    • http://sq11mini.com/wedding_cake_toppers_san_antonio_tx183ox.pdf
    • https://nivikaxixigimom.weebly.com/uploads/1/3/5/3/135322477/sidunu.pdf
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5fd76f9c4e2cd.pdf
    • http://suzenax.22web.org/mawonevewabatawitilizodi.pdf
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5fcbbecf3f270.pdf
    • http://reetodo.online/plato_republic_translated_by_gma_grube_book_2nr0uv.pdf
    • http://narelavupes.22web.org/bofawaremum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/buganabowumujef/75422926955.pdf
    • https://uploads.strikinglycdn.com/files/0c0d0222-ad95-4397-889e-8efc4ee0dcdf/wovodedubodebidibewi.pdf
    • https://s3.amazonaws.com/mamibis/bismillah_song_mp4_video.pdf
    • https://s3.amazonaws.com/xixonu/facebook_login_page_android_code.pdf
    • https://s3.amazonaws.com/fadadedezeker/lapidom.pdf
    • https://uploads.strikinglycdn.com/files/bbfcf5cb-0a01-436e-af27-497cf3bd58fe/where_is_the_power_steering_fluid_on_a_2004_chevy_malibu.pdf
    • https://uploads.strikinglycdn.com/files/0f193d40-abcb-4bae-b3e5-aa2ed0109bbe/favivimidelilarijuso.pdf
    • https://s3.amazonaws.com/vawoginele/52541319308.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_off00011fb0.bin
5df310fabd29083bbe8c7aafc257e98aa5548222e63eff9a1b8336a317f888ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB0 5572 bytes
font_01_sfnt_off000132aa.bin
b2ec843c87e9dfec6b0ff3d552b957aa61356c8a4764aa6a35c504817997f73d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132AA 11052 bytes

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