Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f619ce76d40f965…

MALICIOUS

PDF

78.2 KB Created: 2021-03-25 00:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c8a713bd37416f4d61ed5985e9378b9c SHA-1: 16ddd0a4490fe5cd98c65e91a184ecae8e037e76 SHA-256: 3f619ce76d40f9650f1701c592401633dc02e1e400bcc91957ad2642a0d0a95d
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://resalured.ru/strik?utm_term=how+to+relight+a+furnace+pilot+light PDF link annotation
    • https://pepevifive.weebly.com/uploads/1/3/4/4/134480859/9e8f5c1c1.pdfIn PDF document text
    • http://alphabitx.com/zenonaganatigixikevowis6saj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416302/normal_5fc9949620c43.pdfIn PDF document text
    • http://hotita.space/nilimitorinasutezemonusurjps3d.pdfIn PDF document text
    • https://bimipesetasezi.weebly.com/uploads/1/3/4/0/134017520/e785659cad13bb7.pdfIn PDF document text
    • http://myirn.icu/beditirikadozeves98sre.pdfIn PDF document text
    • http://cashbackmoney.info/bedsheet_cotton_picso2kx8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_6014953006215.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/pojikovewijeja/how_much_do_supply_chain_majors_make.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/lisezuwunupunuwavesekoxam.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/sumuxefilujuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/converter_audio_em_midi_logic_pro_x.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/delonghi_portable_air_conditioner_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/jogogaxusutuk.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/noberepetininofozos.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 5152 bytes
SHA-256: dae412786e5683c37eeac984343a70150cc1eb9946a10d65e7dbbdad5311b3dd
font_01_sfnt_off00010641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 11112 bytes
SHA-256: e8ab9a2b2fee353946eedb7b9185ae22d981539254288f5b8e0bd2b6844c37fe

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