Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e5310cd2bd2f3b…

MALICIOUS

PDF

74.9 KB Created: 2021-03-16 23:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 20f98fecd8e3edfea1f6987b90b850c1 SHA-1: 56fc09e12c8e16bf3bb23998b6fb8cbce7b55a8c SHA-256: f9e5310cd2bd2f3b4ac21babd2e877142c8ed7b425b672168d05a885c7fa7de4
196 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 file was flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing lure. The document body, though heavily obfuscated, contains references to 'root android all device apk download', suggesting a deceptive attempt to trick users into downloading malware. The presence of external URIs, including one pointing to 'lozipotod.ru', further supports the malicious intent of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://lozipotod.ru/wix?keyword=root+android+all+device+apk+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383679/normal_5fe04b4868575.pdfIn PDF document text
    • http://wordwild-store.com/665475895953jqpp.pdfIn PDF document text
    • http://ueuniti.website/old_country_song_ringtone_freegpp65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_601ecb7f38bac.pdfIn PDF document text
    • http://max-lifting.store/chrome_extension_videoa16sx.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/sugosubexez/what_is_boy_scout_class_b_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/colorize_image_pro_apk.pdfIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_18c7be0a38f2468ca01af537682146f7.pdf?index=trueIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_21ec459af0694ef99a978b8b984475ee.pdf?index=trueIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_9586528f9b4846cd8735a954c01866ce.pdf?index=trueIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_9ff399bc302d4ba4a08bad236679cf24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/80378520075.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/8376534658.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/75562221150.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/8860685589.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/naxobaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/kenwood_ts_440s_for_sale.pdfIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_cd0c6237fbe34304879e96bd10c8ffc8.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_3162d8511f1d424390e97bd5c9ea5553.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/60115432573.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_07782f38dc494e30bab3ddab4841e9a4.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_off0000e59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 5112 bytes
SHA-256: afbd0c7db1c820421ab45017b9bf52aa0d256ea7e406af897c7675bd989dfce3
font_01_sfnt_off0000f72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72E 10988 bytes
SHA-256: 208bb82b4c52e930445b6de0d1af867c41b4f9c9515bf01c6c1c9f44b52e9ff1

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