Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee102a0b4fbf2116…

MALICIOUS

PDF

85.2 KB Created: 2021-02-25 09:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 51148a6931f9d0429c9be22c30e23bb2 SHA-1: a987f6a850e4c5e703f0632943fe36d042cbcc9b SHA-256: ee102a0b4fbf21168b4ac952a060947aca48c4ab1b85ae268812d9efc711611d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary URL being `https://jottigo.ru/award?keyword=east+of+eden+john+steinbeck+pdf`. This behavior, combined with ClamAV detection as `Pdf.Phishing.Trojan`, strongly suggests a phishing or malicious content distribution scheme. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/award?keyword=east+of+eden+john+steinbeck+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484631/normal_5ff4e301542ce.pdfIn PDF document text
    • https://susejovidexoxi.weebly.com/uploads/1/3/0/7/130775922/mudonezem-guviwezomudu-pobukinesufadi.pdfIn PDF document text
    • http://niverokime.iblogger.org/08_civic_si_maintenance_schedule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_60315ac6744b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5ffba49a805c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470980/normal_5ffacc01438bf.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/iajd5MW/mejikedikupeziseg.pdfIn PDF document text
    • https://fupakedozoj.weebly.com/uploads/1/3/1/4/131407080/xokumokipigenikuzox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_5fd9c1fd58762.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_60038d520fa0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490929/normal_603567632f037.pdfIn PDF document text
    • http://narexatefaz.22web.org/non_benzenoid_compounds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475571/normal_600f639b851d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litopuputorer.rf.gd/latikobujawi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11201 5352 bytes
SHA-256: 9dbaad376faa12de4da22d0cffa3292a011e4f8724d9cfee03b3d3482639cdce
font_01_sfnt_off0001243d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243D 10476 bytes
SHA-256: 1d998c0b6cea19cdc09c609fe1eb78ff6098d002658a58cd8000ef7df370a874

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