Malicious PDF — malware analysis report

Static analysis result for SHA-256 32166e102d4b8e5a…

MALICIOUS

PDF

73.9 KB Created: 2021-02-07 08:25:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3ba5e1dd61f080cc654cdb8810f85038 SHA-1: 6782798b362a016b612d44cf8bab55285c01780b SHA-256: 32166e102d4b8e5a96adf5bfa8bc1126dcd2f1b01d2e9f5739488a577bb9ccba
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, with one pointing to 'jottigo.ru', suggesting a phishing or SEO spam campaign. The presence of numerous PDF links indicates a link farm strategy, likely to distribute malicious content or manipulate search engine results.

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://jottigo.ru/123?utm_term=excel+2016+mac+shortcuts+pdf PDF link annotation
    • https://cdn.sqhk.co/gunonutib/JL8gil2/44126858046.pdfIn PDF document text
    • https://ribavazo.weebly.com/uploads/1/3/5/3/135322422/patugotoxufikamiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_6010f64c50885.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/icifOjg/robot_sharkboy_and_lavagirl.pdfIn PDF document text
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/butowoxogogopug-gabovipid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373271/normal_5fc6116b8840a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481402/normal_5fe2288dd5db6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376609/normal_5fee2288c2cf4.pdfIn PDF document text
    • https://ponigeje.weebly.com/uploads/1/3/0/8/130874529/xukomudokifakelafi.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/3e0358bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413867/normal_5fc91bb7357b2.pdfIn PDF document text
    • https://wazalopa.weebly.com/uploads/1/3/0/8/130814586/1473080.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lefemijip/poe_transform_amulet_into_talisman.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/72525099892.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/jupazapusuwodipubaseregu.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/folagawadede.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/50276951324.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/41195172261.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/am_pm_time_ki_full_form.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_off0000dd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD90 5900 bytes
SHA-256: daf7402dedf1e4a749b0fc7c764a0b5e5f4ed4558996c340bd1e8a3a3aff6d80
font_01_sfnt_off0000f189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF189 12100 bytes
SHA-256: c3c9ff3c084d73cd6822fc3fdd31170545a37a8d940bf3ffd214235c6d0a57c9

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