Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1f94ebc41397ef…

MALICIOUS

PDF

79.7 KB Created: 2021-06-09 22:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08520268f8c7ea1fa7bef469f8e304f4 SHA-1: 0f692317fa8bf5f3d570244c711b68fb0f1862c0 SHA-256: 7b1f94ebc41397ef0c5d9759cdde43ac4db3aa76d7cfac9d1fc3eda87406d268
164 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 suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://smidgel.ru/pbw?utm_term=ganamrutha+bodhini+varnam+pdf
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fe2f4385c31b.pdf
    • https://kisejugizojo.weebly.com/uploads/1/3/4/6/134656745/dikiwijunekos.pdf
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/c4c669af7.pdf
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/kujawitima.pdf
    • https://vuxidozeni.weebly.com/uploads/1/3/4/6/134669409/718428.pdf
    • https://kibugisire.weebly.com/uploads/1/3/4/0/134018652/6714f5db9d.pdf
    • https://romidanunopupef.weebly.com/uploads/1/3/1/1/131163616/sojasosujivaxiri.pdf
    • https://natapuwofase.weebly.com/uploads/1/3/1/8/131857101/gukivube.pdf
    • https://cdn-cms.f-static.net/uploads/4485309/normal_60bb40ed3d3da.pdf
    • https://jitaginedisa.weebly.com/uploads/1/3/4/3/134324559/3702415.pdf
    • https://cdn-cms.f-static.net/uploads/4381759/normal_606b64696b0cb.pdf
    • https://static.s123-cdn-static.com/uploads/4482418/normal_5fc9f9504bb39.pdf
    • https://xizulorojude.weebly.com/uploads/1/3/5/3/135391297/kavogu-fizopofabat-borozeriwema-tezomoroseleriz.pdf
    • https://cdn-cms.f-static.net/uploads/4375891/normal_6043392b54647.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7ccb3d27-4a4c-4eb2-abe5-ff2b9f852cb8/smok_species_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/9b9895bf-beed-49c9-94e3-c2daa4f69527/essential_air_fryer_cookbook_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/33a5f763-3735-4d7f-a7e0-7850f5848754/how_to_change_a_washing_machine_agitator.pdf
    • https://uploads.strikinglycdn.com/files/df742c61-101c-48b7-875f-03a17a5e2074/zupuwexe.pdf
    • https://uploads.strikinglycdn.com/files/5b34388a-7712-4271-b2cf-6cde269395b8/oral-b_pro_5000_smartseries_electric_toothbrush_with_bluetooth_black.pdf
    • https://uploads.strikinglycdn.com/files/cb1bab34-834b-4f91-865a-db52bcb2a700/97743639133.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2e3.bin
cdf1b8400aed4a65ef86f6c89b368a374615b240e8bde68e91fff5703c20f313		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 5064 bytes
font_01_sfnt_off0000e3ea.bin
909ce2a299c58fc32a3ee91966293097c9b7188fffdd4905cd090dac7362b155		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EA 12212 bytes
font_02_sfnt_off00010dfb.bin
8a920642403e862b8d76a30d6502ed32e081761114de4860b32093463e1ee433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFB 16208 bytes
font_03_sfnt_off00012341.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12341 4324 bytes

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