Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b2c094e15b3b40…

MALICIOUS

PDF

64.3 KB Created: 2020-11-11 05:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2bdbda6a03a60a83f37fe4d4c1310a6e SHA-1: d0b611fe1463b143f58b79c763064b72bea98288 SHA-256: 04b2c094e15b3b40355ac43ba368b98f503f15ac32bce7d635963f098daf0945
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://traffking.ru/strik?keyword=works+cited+questions+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f9420b98bb17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5fa41bdcad162.pdfIn PDF document text
    • https://mixekolasum.weebly.com/uploads/1/3/4/3/134388380/e277b03c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5fa24232f2a3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387052/normal_5fab2515a4cb3.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/logape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5f91f3e69dd9a.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/614f10af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f9cc4e0eccc6.pdfIn PDF document text
    • https://forovaze.weebly.com/uploads/1/3/4/3/134315943/jenikaselewodufafu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d4a010-da1b-41c7-bc15-1dafebc3655d/38687099242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b157368a-5346-49b3-8d36-49bc5476bcf8/modelo_de_lasswell_comunicacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd31c51e-7b8b-47a1-9a95-ff87a1de91f4/45020264518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f42a665-a1bd-44b4-8c87-1763fea176ba/zisol.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB48C 5080 bytes
SHA-256: a90cc0c7961ba47dac115eec5f22664d9c24df06765abd5af948792577f27bf1
font_01_sfnt_off0000c5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E8 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000d14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14B 10308 bytes
SHA-256: ba81cc78772c63ec483045009b3717552ee24ec6ad0299e4891b58cd86bbde4e

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