Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0386cd0f69ba30a…

MALICIOUS

PDF

79.0 KB Created: 2021-03-19 07:10:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7d48502a0b8921e7f8edf336dbffc766 SHA-1: 108e649c65b62c1c7166428f64019d343f3701fb SHA-256: a0386cd0f69ba30a520b10655313eb11d26e28f3ec58d4d20ca3484f100e563f
134 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 and presents a deceptive download button. 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-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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/123?utm_term=android+1+fifa+mobile+19+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471455/normal_604700f5182fe.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/81570305563.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/26579654861.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483089/normal_5feaffd6e5ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_602709be3b051.pdfIn PDF document text
    • http://lopozodedawap.22web.org/balkar_ankhila_song_all.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/aptitude_topics_for_gate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d93638-72a1-4bf0-9cb8-4c4e62227498/99326992170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abf3a9f-73d9-4956-bbd8-b7ce9000fc8d/getting_to_know_arcgis_fourth_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2fdf51-8f1a-43ee-bc3b-cf8f735eef20/hansel__gretel_witch_hunters_2013_brrip_hindi_dubbed_hd_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ac3a33-14ef-47a8-9c2a-3fea71a9ce63/what_is_all_souls_day.pdfIn PDF document text
    • http://xirexadugimog.atwebpages.com/company_law_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/chinnamma_chilakkamma_tamil_video_song_free.pdfIn PDF document text
    • http://lejapanuvijul.rf.gd/mbc_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/35528588586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c18dd2-52ef-462c-95d9-4065ff2ec5e2/vuleketiwiwerile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4dfcd3c-a17f-4c96-92e2-bb1a8fe8fec8/is_death_note_movie_still_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/lenovo_t430_new_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f340931-9cc7-4523-8826-f293faa26305/folimozevod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc5dd89c-74fd-4639-b0d5-1369c0677beb/zewifimavefovi.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_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 5408 bytes
SHA-256: 47b3f14338b9e4eaea30cb25a332ba13b881936d24349e26e6ce4dd55bd0acc1
font_01_sfnt_off00010850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10850 11128 bytes
SHA-256: 4937f84d6e9d6a8d63572fcf7d71528e701a15ab528629e57c4fd712613f015a

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