Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06e3242534524c4…

MALICIOUS

PDF

77.9 KB Created: 2021-03-31 23:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7aaabb67b84d553a9e5bb68895db4321 SHA-1: 540405fc64ac0c4f5e74d552f04380cbcd40e32d SHA-256: e06e3242534524c40b824d98dbdd21d1c9e22b2ab550c6d4bd85a06bb61356fc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://gimoguvi.ru/award?keyword=toefl+pbt+sample+test+pdf+download PDF link annotation
    • https://cdn.sqhk.co/dinigivo/sigHFwp/91007282136.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/ThjkukK/57323999229.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/how_to_convert_graco_lauren_crib_to_toddler_bedrveon.pdfIn PDF document text
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/f55ae551cb3.pdfIn PDF document text
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/0d6a5.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/ehjiiig/wow_blacksmithing_guide_classic.pdfIn PDF document text
    • http://niwopofe.scienceontheweb.net/gisutipazalemuvega.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/UidjiMr/99863752891.pdfIn PDF document text
    • https://verebabivudasa.weebly.com/uploads/1/3/4/7/134771522/7534947.pdfIn PDF document text
    • http://mignonette.space/differenza_tra_bid_bond_e_performance_bondh014s.pdfIn PDF document text
    • https://cdn.sqhk.co/pipezifiwip/Q1Mjfge/aviator_f_series_smart_pilot_watch_manual.pdfIn PDF document text
    • http://servicesforsupport.com/ziluwujwxfd.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/fikijilelidip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_3d7c89df38404bf2954f9c056be0d91f.pdf?index=trueIn PDF document text
    • http://napipipazapuka.epizy.com/bitdefender_internet_security_2019_deutsch.pdfIn PDF document text
    • http://lufuvaza.epizy.com/what_is_gimp_meaning.pdfIn PDF document text
    • http://vidilig.onlinewebshop.net/proposal_skripsi_akuntansi_perpajakan.pdfIn PDF document text
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_1ee1d2141d394acfa76e029128816c07.pdf?index=trueIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_e03aef432dd646588c6f9deb6c6048b1.pdf?index=trueIn PDF document text
    • http://desetezovadu.epizy.com/arduino_ide_link.pdfIn PDF document text
    • http://butexageteril.rf.gd/xipenow.pdfIn PDF document text
    • https://3c59ccad-08dd-474b-8af0-a42d91f20399.filesusr.com/ugd/489ff0_df890d7f3bac48d4b46651764d8c19c6.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_off0000f33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33B 5272 bytes
SHA-256: a3f606cdcf6fca11383f31f9dc3739d4cbe2897cdd27fa1f74eb6accd377f83a
font_01_sfnt_off00010521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10521 10940 bytes
SHA-256: a02cf564b56359c7553f287f5f634ec517166de8c01180279b1780174c861a53

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