Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f7fa073838bfb2…

MALICIOUS

PDF

86.9 KB Created: 2020-11-17 18:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e21f485787e8205991112426a5c6992 SHA-1: 1f1e71426d117417ba0615e39b150fa08a305e7a SHA-256: c0f7fa073838bfb27361c8bc354c584eaf6f6982ce73d4140997f0ddf799e74c
164 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malicious content lure, indicated by the presence of a large number of external links, many of which are numeric slugs suggesting SEO manipulation or a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content or facilitate further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/strik?utm_term=the+spy+next+door+2010+dual+audio
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f8d13505a909.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/d716556441028b.pdf
    • https://rimejosokodux.weebly.com/uploads/1/3/4/6/134691074/nuzubanov.pdf
    • https://nawowelefet.weebly.com/uploads/1/3/4/4/134498780/ralexivun_wubita.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.orgThis
    • http://www.fontrix.comhttp://www.nhncorp.com
    • https://uploads.strikinglycdn.com/files/c4c8468f-e0d3-4a0c-a007-3805e8a59c94/49514601749.pdf
    • https://uploads.strikinglycdn.com/files/03e37481-b5d4-4273-8f10-49ea41b00050/korean_english_dictionary_app_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/9aa5b569-d8d0-42fa-9dec-c2c3db6f2f68/gomira.pdf
    • https://uploads.strikinglycdn.com/files/18b4eee7-272a-429e-bf27-450493d8b302/zafen.pdf
    • https://s3.amazonaws.com/jadudusujuje/fandom_wiki_megaman.pdf
    • https://uploads.strikinglycdn.com/files/c7957d3c-953b-4fd8-b957-22b2d656df05/97287016197.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://scripts.sil.org/
    • http://scripts.sil.org/OFLAbyssinica

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4e6.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E6 6744 bytes
font_01_sfnt_off0000d5cb.bin
57c9a7fe6f577601556e76b23beb31d27e3144cfdbc35608474a28b468fcefea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CB 5492 bytes
font_02_sfnt_off0000e87b.bin
25d2fbfb5dd46bce752f1a10cbb8fe29a5ece10bd9e4a33cfa5ea6c363d8700b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 20968 bytes
font_03_sfnt_off000108ae.bin
fc56fa02dbe3458291c5fb7062dec2b01f2226dd21b4eff9ce88880a69c4a691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108AE 2276 bytes
font_04_sfnt_off00011270.bin
8db65adc699bed2ed4e99b174e414cace916d9ae25f4e5597e3d94de4d1667c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11270 2116 bytes
font_05_sfnt_off00011c18.bin
798b73976e759a672e39c0d4b62013849d0093a5a0f7d8d0804db3ed16af0953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C18 12380 bytes
font_06_sfnt_off00014444.bin
589f2a64e89766a8ae62896ea8444fa1a87810255c984bbc4fd2a260c4929d56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14444 2056 bytes

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