Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ae132c9ba184d4…

MALICIOUS

PDF

78.3 KB Created: 2021-03-02 22:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 836fae9e2738babf4d2b96477d9022bd SHA-1: eb0c65c9510cc0973ffc5dc23a8748ef3d8598fe SHA-256: e8ae132c9ba184d4106951321f602d6f9076aa9f22084c3e9e853567b9ef188c
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/123?utm_term=clicker+klik2+keypad+programming PDF link annotation
    • http://madawuboso.sportsontheweb.net/pitasulo.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/marvel_comics_free_download_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_60262ad5cd73f.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/huihggM/werewolf_diy_costume_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_600ff53c41ddf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404529/normal_60092310a6679.pdfIn PDF document text
    • https://litefobobufi.weebly.com/uploads/1/3/5/3/135326689/kufuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxifup/b8djhud/27627990727.pdfIn PDF document text
    • https://xovomono.weebly.com/uploads/1/3/5/3/135345708/2990090.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/awCzHig/recharge_to_nepal_paykio_nepal_recharge_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/tygi9xj/hitman_sniper_2_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/Cabvgji/pugeworidebi.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/how_to_get_rid_of_best_friend_heart_on_snapchat.pdfIn PDF document text
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/zijabelev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/informal_letter_writing_topics_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/89625282474.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/how_to_program_radio_shack_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/rogers_cable_tv_guide_orangeville.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 5420 bytes
SHA-256: 2b929badf08eac785822d028bc563d6cbf8280feabb0b00c3f4c44e0a2f78ccd
font_01_sfnt_off0001027c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027C 11688 bytes
SHA-256: 79f7920bcfcf4662c5c8d518c468bd6ad3e67f26f20ad6a9db6f77b58df6bf31

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