Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2228e44f886e3ef…

MALICIOUS

PDF

72.9 KB Created: 2021-03-24 17:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2b1a5be6c460d5fbac4ba04af2ac0d64 SHA-1: e67446661229469042749726298e5c08e756bc97 SHA-256: c2228e44f886e3efb7a7b3b92e53becc571a527d6159be9f65e0bd8e2ac05dc8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://leonvi.ru/wix?keyword=power+electronics+mohan+solution+manual+3rd+edition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449987/normal_5fc5711a3ea68.pdfIn PDF document text
    • http://biggymstoe.com/bidizelofomu2z02m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375528/normal_5fff08232cdf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427499/normal_60141a3b16b3e.pdfIn PDF document text
    • http://wofeboz.66ghz.com/kevivop.pdfIn PDF document text
    • http://zifezuguwimifu.22web.org/how_to_make_a_line_graph_in_math.pdfIn PDF document text
    • http://proita.space/94925718390cms7w.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/waninates.pdfIn PDF document text
    • https://gekimirit.weebly.com/uploads/1/3/4/7/134700474/9645fe341b8.pdfIn PDF document text
    • http://pedron.fun/nuwijewezagofqi0jt.pdfIn PDF document text
    • http://normaa-id.com/24583911273gtsne.pdfIn PDF document text
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/zanerurajano.pdfIn PDF document text
    • http://zabavnyi-slon.ru/voyages_in_world_history_updated_ap_editionjl16l.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
    • http://tasefabomodewiv.epizy.com/political_campaign_strategy_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/introductory_statistics_10th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/i_want_to_learn_english_speaking_online_free_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/adalat_film_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9111e25a-478f-4ebf-a6dd-3a6cab696627/mokubalezojorodufuf.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/jiluziwimupukezakufasuxew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d8bd2c6-4190-4864-b43e-be6997068df6/21064009242.pdfIn PDF document text
    • http://rinevagu.epizy.com/lamibesubiwetaguxabufi.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_off0000d355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD355 5316 bytes
SHA-256: 4e1a9da20c5b868f83fc95f8be7d4b7bafad804d956d014b8b2c3a32b4167846
font_01_sfnt_off0000e53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53A 10144 bytes
SHA-256: e8bb8114c59d4271a14998bbf242f58febdba4a55fe9d09c85e663cdf205b414
font_02_sfnt_off000107e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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