Malicious PDF — malware analysis report

Static analysis result for SHA-256 496e91c91c997a74…

MALICIOUS

PDF

79.0 KB Created: 2021-05-09 00:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5a364bf0f5f5caa7fb72e01c46937a1c SHA-1: 242aeb34b4068a4afe874cf39247e0fd878cf46a SHA-256: 496e91c91c997a74142f16b6b967c4c74c87935c1391f8b2895d249946d3d7f2
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-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/strik?utm_term=2007+jeep+grand+cherokee+overland+review PDF link annotation
    • http://bupetud.xyz/wu_tang_clan_show_netflixnzs3s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_5ff2893885d99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379849/normal_6006386bea0b1.pdfIn PDF document text
    • http://good-production16.site/jean_michael_rapperhsqgw.pdfIn PDF document text
    • http://nosotedidapozal.22web.org/mavavazaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500883/normal_5fe6b2d0079e3.pdfIn PDF document text
    • http://tamakar.tech/ulrich_beck_world_at_riskaq02z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://369206df-e466-4f8f-9771-850d1edb33c5.filesusr.com/ugd/8fd5dc_476b81a360c2450db6b8ef2ac279c2dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/ruligurikexusizanitojizi.pdfIn PDF document text
    • http://duvojawakupo.rf.gd/95165019494.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/zodopedulupejobilujonu.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/99812461636.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/country_dance_songs_2019_2_step.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/apc_back_ups_es_700_manuale_italiano.pdfIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_c731b7810bcd45e3a6bd41642964554d.pdf?index=trueIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_98319e78def04972a7ca18a7f6c8a5e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lazolu/jixopuwufajipotegozojakik.pdfIn PDF document text
    • http://tewusuvajoj.epizy.com/konica_minolta_bizhub_206_specifications.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 5416 bytes
SHA-256: 210d143dde39804ea90d2ae401bd8b0fe9aedd327e79c6d3e0d810cebce1ecbb
font_01_sfnt_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 10520 bytes
SHA-256: f0731b7e17b907a7793ae1c7a8ca6c22122874914133291b6b6b0a4ee9849128
font_02_sfnt_off00012060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12060 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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