Malicious PDF — malware analysis report

Static analysis result for SHA-256 1499ef5f6f3b3155…

MALICIOUS

PDF

78.8 KB Created: 2021-03-29 23:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65f5202a6c36152ec8ab20892c2fe7bd SHA-1: bc3c82057f29865f2ca122f34d4956aead1d56a0 SHA-256: 1499ef5f6f3b3155fd660befe8259075119eda6fa86ae68cbc75c9ab3ac92689
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning to drive traffic to malicious sites. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing trojan. The embedded URLs, such as 'https://lozipotod.ru/award?keyword=periodic+table+of+elements+list+pdf', suggest a lure related to search engine optimization and potentially phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=periodic+table+of+elements+list+pdf
    • http://mbfsopg.com/best_emulators_for_android_2019nv189.pdf
    • http://life50it.pro/61890418094698ed.pdf
    • http://lnstagram-blue-ticks.com/articles_a_an_the_worksheets04hwr.pdf
    • http://znalomstvavip.site/kirekuvujuziloxavrx.pdf
    • http://ctyr.ru/borderlands_the_pre_sequel_dlc_trophy_guideaxum3.pdf
    • http://artemk.ru/8915776800835pmn.pdf
    • http://runolive.com/59962706385v8ukh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kegubinefuda/wageferororesopo.pdf
    • https://uploads.strikinglycdn.com/files/60a2b8e5-71be-446c-864c-d3d63b4dbae7/28181248760.pdf
    • https://s3.amazonaws.com/xovajukoxin/autoit_file_script.pdf
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_5e4ba127160a48a4b365707fac7d822f.pdf?index=true
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_4b45dfc3d8764d9cb9eae29a48e0a217.pdf?index=true
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_c7c1ef6f433d41b4847f90c6aa0d6e22.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0ec34e4d-eaf6-4514-84ed-7c3fddc8db7b/74131499138.pdf
    • https://s3.amazonaws.com/rorives/kuzopixoj.pdf
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_f9fd87bc837442b3916fc2c07685a52f.pdf?index=true
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_65d4ce1c2f184a0eb8d07e4232fcab6d.pdf?index=true
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_fb74bf4b6041487090637930d20a23b3.pdf?index=true
    • https://s3.amazonaws.com/xomepixo/yamaha_hs8_pair_guitar_center.pdf
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_b50ecbbbaf1d4e299e248e798f1b1b0c.pdf?index=true
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_82bfee8b505a4233923d65f03314589f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/68a7cf19-d288-49b8-b127-47182fac17af/gifadanatafununofetofa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f315.bin
5a1a5634664cc77ca4d0bc53a39842fa629a915f994741dcff3b7272b24a7b20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 5444 bytes
font_01_sfnt_off0001057c.bin
205d8130d71bee7bed261675338ce7e757420b9badaac552ddfa204fa88c6a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1057C 11528 bytes

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