Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b3877af1da8462…

MALICIOUS

PDF

102.6 KB Created: 2021-05-31 01:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bab36a74835d9b68c021b142849e5b5f SHA-1: 8ac8c123996d54e03842d2c2826b833dba542c5f SHA-256: 09b3877af1da846239ba1d362f7e4dc6f16a7c8acf4e98f98af6f1d28bc8c6d5
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • 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.
  • 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=%25D0%25BE%25D1%2582%25D0%25BA%25D1%2580%25D0%25BE%25D0%25B2%25D0%25B5%25D0%25BD%25D0%25B8%25D0%25B5+%25D1%2581%25D0%25B2%25D0%25B5%25D1%2582%25D0%25BB%25D0%25B0%25D0%25BD%25D0%25B0+%25D0%25BB%25D0%25B5%25D0%25B2%25D0%25B0%25D1%2588%25D0%25BE%25D0%25B2%25D0%25B0+%25D1%2587%25D0%25B8%25D1%2582%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BE%25D0%25BD%25D0%25BB%25D0%25B0%25D0%25B9%25D0%25BD
    • https://rojogude.weebly.com/uploads/1/3/4/3/134396813/5071356.pdf
    • https://rodavilimagenub.weebly.com/uploads/1/3/1/3/131381679/7978517.pdf
    • https://cdn-cms.f-static.net/uploads/4413000/normal_60225dde2ef5a.pdf
    • https://wezusewowanura.weebly.com/uploads/1/3/4/2/134235680/visarugabisif_nijafewek_mogado.pdf
    • https://fusutazewemeben.weebly.com/uploads/1/3/5/9/135976358/ad6382e459.pdf
    • https://faromemexe.weebly.com/uploads/1/3/5/3/135399009/7032295.pdf
    • https://fibutoledul.weebly.com/uploads/1/3/2/7/132741024/1432761.pdf
    • https://static.s123-cdn-static.com/uploads/4453754/normal_6001037843b74.pdf
    • https://kunobutos.weebly.com/uploads/1/3/4/2/134234797/gimizamot.pdf
    • https://zasufademebarav.weebly.com/uploads/1/3/4/7/134737005/1785863.pdf
    • https://cdn-cms.f-static.net/uploads/4450634/normal_6032649d13ce1.pdf
    • https://cdn-cms.f-static.net/uploads/4459464/normal_604b7a5c6b902.pdf
    • https://tepukijamuboze.weebly.com/uploads/1/3/5/3/135301813/231b8.pdf
    • https://takesefitetipal.weebly.com/uploads/1/3/2/6/132682925/4981240.pdf
    • https://doliwalesi.weebly.com/uploads/1/3/0/7/130776147/7776936.pdf
    • https://cdn-cms.f-static.net/uploads/4464734/normal_602fa9c3e793e.pdf
    • https://davijonixumitu.weebly.com/uploads/1/3/5/3/135349017/damarusizofefekegasu.pdf
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fef6378c1239.pdf
    • https://kusijavi.weebly.com/uploads/1/3/4/3/134385668/dd8ec.pdf
    • https://roparinupiw.weebly.com/uploads/1/3/5/3/135392621/b65e944c1c0.pdf
    • https://static.s123-cdn-static.com/uploads/4486987/normal_5ff5177b9fa41.pdf
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/gitonamulatitotane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.fontrix.comhttp://www.nhncorp.com
    • http://www.daltonmaag.com/
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121c8.bin
691ba1b31daf0c2966c100f01d6f5524d34658fe977165079cd1dd3112516d81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121C8 5064 bytes
font_01_sfnt_off000132e6.bin
9f1da586c8d7269000e191120aa9d3ad23cbe4f029ac9da5aa71470ae24f9e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E6 12344 bytes
font_02_sfnt_off00015aa5.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA5 16204 bytes
font_03_sfnt_off00016fd6.bin
02ba2427944513ac548a8ed987445fed32ff4a172c4d0c6aa928035681570b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD6 2460 bytes
font_04_sfnt_off000179e1.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x179E1 4324 bytes

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