Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f4589356d03876…

MALICIOUS

PDF

84.3 KB Created: 2021-03-30 10:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dbcf137be0605965506cbf645162118d SHA-1: ca529cfacb9dcedfc3db417144e8d0995459e55f SHA-256: d6f4589356d03876949c96a7a93f67d5913883afdf077d96365fb43b1db84264
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URL that appears to be a lure, masquerading as a 'dishwasher manual'. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to download and execute a secondary payload, likely through embedded JavaScript or other exploit mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=amana+dishwasher+manual PDF link annotation
    • https://cdn.sqhk.co/fetadupozo/hajg6NG/sandstone_flags_warrington.pdfIn PDF document text
    • https://cdn.sqhk.co/zewezerezi/V3kpvia/kudixilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374368/normal_600c100df3e52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_60517419e2415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487918/normal_6038f0c69618b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_6052ab1c01125.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/xmZXjdq/tiny_space_program_how_to_make_money.pdfIn PDF document text
    • https://cdn.sqhk.co/raduvonudo/jjfTi6K/94598167315.pdfIn PDF document text
    • https://cdn.sqhk.co/bezofusipow/gBljjif/funny_videos_try_not_to_laugh.pdfIn PDF document text
    • https://cdn.sqhk.co/vekazedivipi/fVHs1RL/gijidunofupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_60535926ea301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365606/normal_5ff9ce143b022.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/petubapizo/jixeredimane.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/54383722344.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/revenue_canada_2018_income_tax_guide.pdfIn PDF document text
    • http://jivixolijenirew.rf.gd/wabomurudu.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/sight_singing_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/57299817341.pdfIn PDF document text
    • http://wofabor.rf.gd/bahubali_2_video_songs_free_telugu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 4836 bytes
SHA-256: 2e843f64e977b2e914adc426108ca3da2682d4d9ac6e2cf062727f50646a4897
font_01_sfnt_off00010fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBF 11324 bytes
SHA-256: c8544ef2212981a365c2f9bdb5d7d66fd0afdc7c4812adddbe416ef50ec11f62
font_02_sfnt_off00013638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13638 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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