Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d699bf0a55f7cf6…

MALICIOUS

PDF

74.0 KB Created: 2021-03-11 03:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3368ace8357b5d0e1e6a50491848bd9a SHA-1: 6b3956a2604154d655a7a3c5051bfa745b880d27 SHA-256: 4d699bf0a55f7cf61c9b616444f230cba810b587d8ec56e7d485a0837793aeda
236 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, suggesting a link farm or a method to distribute further malicious content. The 'ClickFix' heuristic indicates the document likely instructs the user to execute commands or disable security features, a common tactic for social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://xajibur.ru/strik?utm_term=what+to+do+if+logitech+keyboard+stops+working PDF link annotation
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/4943383.pdfIn PDF document text
    • https://nasokeluvofof.weebly.com/uploads/1/3/1/4/131453401/degajifametema.pdfIn PDF document text
    • http://pss77.ru/mefojatureritedesifulbv79u.pdfIn PDF document text
    • https://kazawiluk.weebly.com/uploads/1/3/5/3/135384823/bamaxovo_bebififerowuk_kixifademipu.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/rewards_program_readingwru24.pdfIn PDF document text
    • http://stopnutristrike.ru/risopusubitazebimagelejaby3z5u.pdfIn PDF document text
    • http://com-connexion.xyz/36535658284ubjv9.pdfIn PDF document text
    • http://ridunculus.com/snap_on_1_2_digital_torque_wrench_atech3fr250bez51c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476140/normal_6008b13407e10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5fec85179eacb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_248c9583614c4807adeb74036eb32bfd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/acca_examiner_report_fr.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/38431276753.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/86932618466.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/xatigefilosofebemajuke.pdfIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_31405171d4fd4292ade9802ed3f93624.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/nirejejemidefewezejan.pdfIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_03d0ec752d72411eaad621adb8a022ea.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_cec3b733c1f74cceb6177cd9a3a3689d.pdf?index=trueIn 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_off0000e2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 5828 bytes
SHA-256: 84563480634c69085024ccd79edd0ae5cca79f15cc4edbfa75634ec057e20787
font_01_sfnt_off0000f6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B7 10520 bytes
SHA-256: e513e80885605f4f4a970b2ac225a316390233ae58ec446b3112cc21eacc5f28

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