Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06d3cd153206d13…

MALICIOUS

PDF

83.6 KB Created: 2021-03-03 18:37:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ff231fa59871a0fd83388b1bc1e29fb2 SHA-1: 2c5dcc110e53638759a43474f2e1445517564eab SHA-256: b06d3cd153206d13b8364a347873d13da15bb83693454b6286f889ada99e64f0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm. One of the embedded URIs, 'https://soxebez.ru/wix?keyword=unblocked+games+66+fnaf', suggests a lure related to online games. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=unblocked+games+66+fnaf PDF link annotation
    • https://dibagipowuxuz.weebly.com/uploads/1/3/0/7/130776183/bukixufume-migoxoseme.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/jizuwugalas.pdfIn PDF document text
    • https://sobuxiba.weebly.com/uploads/1/3/4/8/134867950/68b99.pdfIn PDF document text
    • http://xofazonir.iblogger.org/rivamok.pdfIn PDF document text
    • http://kaxavetaxudu.mywebcommunity.org/lakogexadejirute.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/where_can_i_donate_womens_business_clothes.pdfIn PDF document text
    • http://jekebes.iblogger.org/72171548287.pdfIn PDF document text
    • http://ravapusevuj.iblogger.org/the_canterville_ghost_characters_description.pdfIn PDF document text
    • https://tijozamuworibop.weebly.com/uploads/1/3/1/6/131607374/zitulavaf.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/present_perfect_simple_and_continuous_exercises_3_eso.pdfIn PDF document text
    • http://nivanugifur.iblogger.org/apple_ipod_nano_7th_generation_charging_cable.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/bokelur/collier_county_fl_red_tide_report.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/99300349885.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/senubikali.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/apple_id_scams.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/63764913987.pdfIn PDF document text
    • http://sawutex.rf.gd/warhammer_40k_kill_team_elites.pdfIn PDF document text
    • http://pugupokevimukov.epizy.com/avengers_assemble_endgame_meme_template.pdfIn PDF document text
    • http://disoluje.myartsonline.com/10534601040.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/654866393.pdfIn PDF document text
    • http://redaxuruzojogod.epizy.com/11361035961.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_off00010a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A78 5592 bytes
SHA-256: abd9e1f19ffa36f95d98d40b88aca93e54606b12cd15ec6f9f946116e05884a9
font_01_sfnt_off00011d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D79 10408 bytes
SHA-256: ea029165abce5eb57cc3e6471da419f970235e054f8801d8fb8f7fc44220449c

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