Malicious PDF — malware analysis report

Static analysis result for SHA-256 7312a6feaa4e8044…

MALICIOUS

PDF

76.0 KB Created: 2021-02-19 20:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 62242bf01bccff2754e804be68bf8008 SHA-1: b7db85216b36e664cd2315c79e7c502698d301b8 SHA-256: 7312a6feaa4e8044bf6ae268d5f3944ebfe46368dc38e87fa0822e811cc86c86
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-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/strik?utm_term=haier+portable+air+conditioner+10000+btu+instruction+manual PDF link annotation
    • https://cdn.sqhk.co/rapurakoke/vCbjfis/minecraft_realms_download_world_failed.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/gijjnhi/71109751839.pdfIn PDF document text
    • https://juwomazitebuden.weebly.com/uploads/1/3/1/4/131414743/bc55de2445c39.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/jcZ23cX/14425357431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411937/normal_5ffd41fdab5a6.pdfIn PDF document text
    • https://cdn.sqhk.co/fujavuraleko/hhhjW4D/faworunimer.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/ijjWjdt/vamuziz.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/cDiiijf/36825942176.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/duvuninixi-nalupu.pdfIn PDF document text
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/7578533.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/Zhgighb/losaxomimizef.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/ijav7bR/77224548825.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/uKNwged/runescape_grand_exchange_bond.pdfIn PDF document text
    • https://cdn.sqhk.co/funuwovo/hchcETA/pc_games_download_for_windows_7_racing.pdfIn PDF document text
    • https://wamukefak.weebly.com/uploads/1/3/5/3/135324497/8c8ce572d67.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/ribowexulo/arabic_language_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/vavudumibosaxoxalukawope.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/55145878818.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_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 5512 bytes
SHA-256: eed6a69497b00a54d0a8cee3e4329ef85d6dd222d9df081bfbb676e223ab5222
font_01_sfnt_off0000fd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD99 10720 bytes
SHA-256: ac721cf0a9dad3da56d442d81e060213aa67ff661bfef67a18a8b383e6b4bc95

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