Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c802323f18eed0…

MALICIOUS

PDF

76.8 KB Created: 2021-03-15 01:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c411adb1436ea932ac07d80833d661b SHA-1: 5ea22e82865e5489b1014841eceeca4c58b45fd4 SHA-256: 04c802323f18eed00f85faa31e1777019b892ba8e0b87a01ad8e871900bbab56
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/wix?keyword=langrisser+wiki+characters PDF link annotation
    • http://ferategaj.scienceontheweb.net/speak_now_3_teacher_s_book.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/ebhiige/ritutag.pdfIn PDF document text
    • http://gukabibus.mygamesonline.org/bullying_escolar_peru.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/fdifgjn/30380322753.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/zedumov.pdfIn PDF document text
    • http://melotedi.iblogger.org/82742018081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_602efe7fabe34.pdfIn PDF document text
    • http://watulexop.iblogger.org/lame_enc_dll_audacity_1._2_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_604a02b0d9114.pdfIn PDF document text
    • http://wativeb.mypressonline.com/49297654746.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_0a937ad78aa94ae7b7a30a70b12c49e9.pdf?index=trueIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_38bad1b4aa86405cb0ee1388960f9553.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_7e54766ec68043d5b4279e1795763217.pdf?index=trueIn PDF document text
    • http://fajazimigig.atwebpages.com/bromhidrosis_adalah.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_d98a4dcfdca74fdfa9a4c8f8fecc6686.pdf?index=trueIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_0f92828e426945b8bb2d6467c555e3b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/ak_47_wale_khalistan_song_djpunjab.pdfIn PDF document text
    • http://jonilobasi.epizy.com/se7en_keynote_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/3101850528.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_off0000f108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF108 5128 bytes
SHA-256: 4ae9cecde593f2087a88239b51a104899d9f4d62d0f0aa79a91ee8e4c447aa59
font_01_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 10380 bytes
SHA-256: b41eb3a952ca0d63f86b1d9d71dbe07ff95e8be1f36286ea763d14c72a39e998

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