Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc5b1ce25c671ac…

MALICIOUS

PDF

79.1 KB Created: 2021-03-15 13:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d9ecf308b64154997a9bfbcc56d6dd6 SHA-1: 7d81b6bbb71ba3868fbf33c5469aa63f387638f7 SHA-256: cbc5b1ce25c671ac0b56c8c025ef7f5f2fde86098a8d3c813be0788c899c83d5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://baarspo.ru/strik?utm_term=energy+soundbar+codes+for+comcast+remote', is flagged as unknown reputation and is likely the malicious destination. ClamAV also detected the file as 'Pdf.Phishing.Trojan', reinforcing the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/strik?utm_term=energy+soundbar+codes+for+comcast+remote
    • http://about-central.com/html5_text_field_heightlzba2.pdf
    • http://sellforce.ru/how_old_do_you_have_to_be_to_be_a_masons8esv.pdf
    • http://onlinekartiadesi.com/tewebusinasujezapuvidcq4mc.pdf
    • http://xepelewatelaziv.getenjoyment.net/acoustics_engineering.pdf
    • http://springwin.space/80068576712u1y8w.pdf
    • http://akillidestekbasvuruformu.online/91907945495b7y1g.pdf
    • http://jedilinosur.mywebcommunity.org/kukapo.pdf
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5fee9b92a869d.pdf
    • https://static.s123-cdn-static.com/uploads/4498882/normal_5fc581cc8e3d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3d723f4f-038c-40de-afee-00a49501a810/pidodowazovix.pdf
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_cd71e6c1fadd4613a1f543319368b68b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ab7c0777-122b-4bd6-bbb5-c06f4d6791f4/52901790492.pdf
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_0e04c827688c4bcf9c6d3b10b304bd74.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6d2cc77f-0404-4508-a5fe-8b5639770b9c/ccna_routing_and_switching_complete_study_guide_download.pdf
    • https://uploads.strikinglycdn.com/files/9358b54a-8e14-499c-80bf-0f0085a2f6cd/how_much_sodium_is_in_a_wendys_single_cheeseburger.pdf
    • https://uploads.strikinglycdn.com/files/1d9e7fcf-3df7-407e-91ce-9d68f0c23a00/nezule.pdf
    • http://sarutufasiko.atwebpages.com/cuales_son_los_tipos_de_funciones_matematicas.pdf
    • https://uploads.strikinglycdn.com/files/a3835a0b-514e-4dc6-aee4-7f108bacfca1/12096300141.pdf
    • https://uploads.strikinglycdn.com/files/1c6de9de-8a23-4b8a-b573-3ed99ba0f5ae/babege.pdf
    • http://luvabokinoleg.onlinewebshop.net/tokikidin.pdf
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_4981e3aa853c4e26bb90b2daf73966b4.pdf?index=true
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_c8710b5c20354348960579583ae6b7c1.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d2.bin
a2eddce4b08f127f86834c50d1370bb4e24f8936df82c711b95f47e7e1782f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D2 5508 bytes
font_01_sfnt_off0000f387.bin
17878ff60753909ac168afe8d53e3d42d60ed7c4d90b4f6bf7cb5aebef9a676b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 11004 bytes
font_02_sfnt_off0001193f.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1193F 16204 bytes

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