Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fed6052850a4a78…

MALICIOUS

PDF

75.6 KB Created: 2021-05-07 05:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7d04193bdbe2706c3ed71d8f9c8e680a SHA-1: b449e6f2632760578554090c856aeb194cbf97bd SHA-256: 8fed6052850a4a788d5690f78e7637d5b5dee6b90f15d9ce6606571332bec178
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://seumenha.ru/strik?utm_term=the+game+changers+castellano+descargar PDF link annotation
    • http://graatorama.fun/toastmasters_table_topic_ideas56f2g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465025/normal_600b68250e0b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_5fd6746e96948.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/13536320712.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/26813265551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_602d8c5ca35cc.pdfIn PDF document text
    • http://fonagifegelu.iblogger.org/obteno_dos_alcoois.pdfIn PDF document text
    • http://store50off.info/mecanica_vectorial_para_ingenieros_estatica_beer_johnston_10_edicionugo42.pdfIn PDF document text
    • http://dezodon.22web.org/im_westen_nichts_neues_buch_amazon.pdfIn PDF document text
    • http://my-credit.info/48474406372pz1xb.pdfIn PDF document text
    • http://leftoutclub.com/gajexaliband07s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_45b3b23f9b714b1daa813444de873085.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_3ce9bb0ad04748ae8a7f1789b7775191.pdf?index=trueIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_416a6b9a34e74783b490e20bdab31acb.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_c300fed6504a4d5b880e935cb419819b.pdf?index=trueIn PDF document text
    • http://lokokojorivumi.rf.gd/mazenilekixovisutek.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/66200411491.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/remedubesexumemepavus.pdfIn PDF document text
    • http://jiporiri.rf.gd/broadway_engraved_bt_font_free.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/kiniwaxagatojediwagi.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/string._format_null_date.pdfIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_0ed85c9240b44a329360555f480a5632.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_off0000e7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AA 5300 bytes
SHA-256: f96e8c59db8ad3e83521f87c5bcf74df317c9f702ff36236c7d902ec0b67a2db
font_01_sfnt_off0000f982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF982 11876 bytes
SHA-256: 59fb87bdd8e1bb48f23aecd1baa0e24a2aa4ab287d00098bdb988e96df69f2c9

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