Malicious PDF — malware analysis report

Static analysis result for SHA-256 110bb03afa687e2f…

MALICIOUS

PDF

69.6 KB Created: 2020-11-25 10:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9993ba5e9f425975e09759dc21e9c46b SHA-1: 1b41eccd7549a60662be5e8c25b19be68cf74f8c SHA-256: 110bb03afa687e2f2ba5ca6f41b6c4f93d4321ccf4e397573ef4abf4e56b3f4b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one identified as a potential phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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://traffset.ru/123?utm_term=shiver+junji+ito+barnes+and+noble PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408463/normal_5fa706bb09545.pdfIn PDF document text
    • https://toriradusug.weebly.com/uploads/1/3/4/7/134744904/8651980.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/f89dbe4c-e3fe-4cc4-935b-ae87c8ff1de9/40963765611.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/nekusil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e032f3c0-e8e8-48cf-be14-18effafce096/saC49F_salim_1_izle_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074c2951-3530-4e36-9c57-da3fe5dc0fe2/babyshop_promo_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81025066-de5c-4cf4-a997-ccd2e2385aaf/64517224815.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/spacing_metformin_doses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af03a5c2-816d-4910-ac2e-0ae9e4c961e2/wajup.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/pump_head_calculation_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fbd44d-b19a-4fd1-9a4e-ea76d650dbdc/bacteriologia_clinica_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/92071916768.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/mp3hungama_old_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/zixej.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7F 5292 bytes
SHA-256: cc066917df905007b2264212065a0c10fa36ebe6c4364e8d1d35ef3c4737c135
font_01_sfnt_off0000d076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD076 10528 bytes
SHA-256: 6ee1b7ec0fb2421238845c2c28dacebfccd209ab29b0735479a198b5ff32ca5a
font_02_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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