Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70741813f55641e…

MALICIOUS

PDF

89.2 KB Created: 2021-04-08 09:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7d319d10bcbe063e8b9ea42959d7c188 SHA-1: dee68bf0448f21b0c7ca59f70b1a4d25eb2ec826 SHA-256: d70741813f55641e0c54510a678f0b293ba152c74803d5e1044b95956d58bcaf
104 Risk Score

Malware Insights

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

The file is a PDF with a high ML classification score and ClamAV detection indicating it is malicious. The heuristic 'SE_INVOICE_LURE' suggests a phishing attempt, and an external URI pointing to 'midufefew.ru' was extracted. While no scripts were explicitly found, the PDF structure and the presence of external links are indicative of a phishing campaign, likely aiming to deliver a malicious payload or redirect the user to a credential harvesting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://midufefew.ru/wix?keyword=hsfpp+module+5+answers PDF link annotation
    • http://biotringel.shop/93010969605zgfls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470014/normal_6047318223f6c.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/8thbEji/22206641496.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/auEShiQ/online_furniture_auctions_michigan.pdfIn PDF document text
    • http://milanomoda-italy.website/etincelle_physique_chimie_tronc_communhuu3q.pdfIn PDF document text
    • http://believes.space/3958634525c19vp.pdfIn PDF document text
    • http://masalev.ru/dollhouse_movie_ratingtf3u2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_6042bd037c79d.pdfIn PDF document text
    • http://help-violation.com/wulajexufawinegabirirk25eb.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/cWfjhy2/dupajolonabojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365619/normal_6003c53712637.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/cpzhg1K/puxamuditopumap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lovomijelun/luwekatesusakojuxad.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_b0b7dad50450451db2e3f9cc002fadd3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/vce_file_onlabs.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_81eef81968424b7d9e012546e04d80c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daxemo/kometotatazujukovofe.pdfIn PDF document text
    • https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_636482842f8947d0979aa90e38f8f3d2.pdf?index=trueIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_6b4f903889c64a1a805df7a8abb0fd39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/boarding_gate_2007_movie.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_631d260c33004563ab0ea551d61f6712.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_5887401f54c74da1a33ac10e9b3ae723.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazixipame/friends_season_10_episode_17.pdfIn PDF document text
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_c841797fd9b24e648105c85eefda6109.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E95 5116 bytes
SHA-256: 895785557d3fce5a89f4d4dfc24c662febd43162fae627379a20e3a5c908316c
font_01_sfnt_off00011fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEC 12140 bytes
SHA-256: d838ee52a83ee4e18fc966bf915c69e250ff245538bd3cf97624c7b2e08af3f2
font_02_sfnt_off00014959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14959 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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