Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cedf53f5a0a5f5…

MALICIOUS

PDF

147.1 KB Created: 2021-03-20 08:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5a447d82c221018652b16b97b48f6ac9 SHA-1: 0ddaf7de3cdc2543e110a66d593dc4c81821e286 SHA-256: 74cedf53f5a0a5f5884bbce5fcbb9d913cc17816014e47a09deeb1edfc11feec
166 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document instructs users to copy and paste content into a command-line interface, a common technique for executing malicious code. Several external URLs were extracted, with one pointing to a suspicious domain ('resalured.ru') that may host a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/123?utm_term=activeperl+5.+16+32+bit PDF link annotation
    • https://cdn.sqhk.co/posebozej/jaRijfb/wakudiwojaduweriv.pdfIn PDF document text
    • https://cdn.sqhk.co/zamodozitip/fAijaja/ringtone_download_free.pdfIn PDF document text
    • https://xijukuto.weebly.com/uploads/1/3/4/3/134354051/zivupotinonomev.pdfIn PDF document text
    • https://bowutemol.weebly.com/uploads/1/3/4/2/134234741/510fd6900.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/bYKoJfR/xesikosedawoxutikiles.pdfIn PDF document text
    • https://pururejipe.weebly.com/uploads/1/3/4/2/134265449/viver.pdfIn PDF document text
    • https://wipasajumavadus.weebly.com/uploads/1/3/4/7/134775966/wadelonifuva_lukikamepoxiroz_lapunizimatu.pdfIn PDF document text
    • https://cdn.sqhk.co/mejapevelu/hLUAifi/5592558628.pdfIn PDF document text
    • https://cdn.sqhk.co/putevupumaf/higoiar/24578770112.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/jufbihV/biriz.pdfIn PDF document text
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/cce60a992db4.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/WT6s8CB/webiwaxakowudot.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/ahjZaia/jatuzadegunolis.pdfIn PDF document text
    • https://cdn.sqhk.co/nivatasob/hapjbBi/10666236970.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jetetekeputesi.epizy.com/nuvarezagi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/muwijegoxoxumoxamawini.pdfIn PDF document text
    • http://wekiwuja.rf.gd/boot_usb_stick_format.pdfIn PDF document text
    • https://f5f74d4f-f804-4d9b-9bfa-9964b2756261.filesusr.com/ugd/e389b3_12a4b8e733814d1fad665df020e11636.pdf?index=trueIn PDF document text
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_5624ed1e67a34e1da02b0624595caa83.pdf?index=trueIn PDF document text
    • http://titarejidawe.epizy.com/home_budget_template.pdfIn PDF document text
    • http://ruvoluze.rf.gd/non_stop_christmas_songs_remix_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/rulakeromuwojanami.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/10594765324.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_cf1455ab43d9483486dca0b9ace33b6f.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000161c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161C8 53152 bytes
SHA-256: e699c951d96ad6d7e385220aa09aaea679b55949160cae8b2113fd252bc1dd7a
font_01_sfnt_off0001ef7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF7D 5388 bytes
SHA-256: 1b59fff5d56061de4ce1e0cb5ad9f70160cbd13a33b3aff4628860a4218eeb17
font_02_sfnt_off000201f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201F6 11336 bytes
SHA-256: 359c17e7694dae1d637fd3f795b07f4e0ab373e7d1e3ce4d37b78ff8e6f19acc
font_03_sfnt_off000228d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x228D5 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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