Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15a8ab0d3d494d0…

MALICIOUS

PDF

109.0 KB Created: 2021-03-22 23:33:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5763ac871273b5233c9283746c26be25 SHA-1: 23594ade34c4d0ceca55219718e7a3cb8baef0cc SHA-256: b15a8ab0d3d494d080c4a0c0811a307643a10df9769a6e97c793804c5e435fc7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The PDF contains a mass external link farm, with one prominent URL being https://resalured.ru/strik?utm_term=what+score+do+you+need+to+get+your+permit. The document body, though heavily obfuscated, appears to be a lure related to permit scores, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of numerous external links points towards a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=what+score+do+you+need+to+get+your+permit
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/wezapajifu.pdf
    • https://mefirotevi.weebly.com/uploads/1/3/5/3/135314773/rasubixigudetij-wezuxib.pdf
    • https://libesomed.weebly.com/uploads/1/3/4/9/134904451/b0a2929d6405.pdf
    • https://wigapekowuv.weebly.com/uploads/1/3/4/4/134488511/gozeganov_nejagi_bemefasefu.pdf
    • http://baffer-shop.space/sugexevokunisowegovox7vo7p.pdf
    • https://wuguruxozoza.weebly.com/uploads/1/3/4/0/134040539/501225cb81.pdf
    • https://nuxowodevuj.weebly.com/uploads/1/3/4/6/134609076/900524.pdf
    • http://jisuvakuwiraza.medianewsonline.com/concepto_de_trastorno_alimenticio.pdf
    • https://danegatazi.weebly.com/uploads/1/3/0/7/130776269/816624.pdf
    • https://kazilapematif.weebly.com/uploads/1/3/5/2/135293457/4ca14df0.pdf
    • http://online-bestshop.xyz/1364309218wc1o3.pdf
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/3728557.pdf
    • http://nuloriwilorij.scienceontheweb.net/83985001098.pdf
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/nunefotananelolomovi.pdf
    • http://vykupavto54.ru/income_guidelines_for_food_stamps_in_pavi3ac.pdf
    • http://muldwych.com/279118972047dhwd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eb65e740-9e29-4a8c-9a0d-ff7c02da67c1/loxewu.pdf
    • https://uploads.strikinglycdn.com/files/25c5b9be-265a-44c4-a4ef-c66745cf1fbc/hundreds_chart_to_120.pdf
    • http://vomewudige.atwebpages.com/52788625788.pdf
    • https://uploads.strikinglycdn.com/files/7f308d0b-bb0b-4a9f-912a-135bfa589a96/korg_er_1_mk2_occasion.pdf
    • https://uploads.strikinglycdn.com/files/cc95d0d9-37bc-4a83-b8b1-ff338ab034ca/68471239614.pdf
    • http://xepuzakudera.atwebpages.com/arranging_numbers_from_least_to_greatest.pdf
    • http://tagijonegularol.myartsonline.com/sufulolulonagalexefezisim.pdf
    • https://uploads.strikinglycdn.com/files/f77eb072-2db7-4e12-9144-81c26c143b43/trane_xr14_condenser_price.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_off00016d89.bin
aeaf7013e8f8818066792a208d0e6469c13fb1f427566be47bd7660ad9291604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D89 5572 bytes
font_01_sfnt_off00018063.bin
65c8ef1a5ce6b64b2833254c256ad134dd5f4329c59f658daf9a07f583ca5395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18063 11064 bytes

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