Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3f4ee8d2c2e6ce…

MALICIOUS

PDF

76.9 KB Created: 2021-03-26 06:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e0e1c4c77049fe930070d00c118f5402 SHA-1: 5e5c95ca9ff0eb4c69e6e2b42830a1eed718946b SHA-256: bd3f4ee8d2c2e6ce5cebfa7756e63fc7844048e4eb7ee9e135b408dbc0123e27
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 0.9990

Heuristics 5

  • 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 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://druttle.ru/strik?utm_term=how+do+you+play+d%2526d+5th+edition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480886/normal_6056b79fa2771.pdfIn PDF document text
    • http://visionnew.xyz/givamarezilimuwipiltw89o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_6045067558818.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/iiLNBha/guess_the_song_lyrics_quiz_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482405/normal_6005b7c54447a.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/hcxbaja/45580619050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_605c84ffb097f.pdfIn PDF document text
    • http://freshka.fun/14486423039ok8m6.pdfIn PDF document text
    • http://osthondroz.com/13146909219babrt.pdfIn PDF document text
    • http://yoptan.space/labupijojepanetaganurb0dnn.pdfIn PDF document text
    • http://strahuemsya.info/cydia_installer_netgbbf5.pdfIn PDF document text
    • http://loveworld.club/96444230167kacvb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470226/normal_601c9c364e588.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/92057033473.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/fhciivu/cooking_games_unblocked_papa_s.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/sFZZKjd/jogevukatubupokug.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/79201186787.pdfIn PDF document text
    • http://itravelgr.com/fruit_smoothie_recipes_with_milk_no_yogurtmm17q.pdfIn PDF document text
    • https://cdn.sqhk.co/rulopojuna/bhfiUP5/kojosisiralifevipanetu.pdfIn PDF document text
    • http://instapodarok.site/89868743512g6xgg.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/how_to_make_baby_in_womb_sleepunqoh.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/8b45d52a-88b7-4882-bf0e-795c819c3a6c/53251260366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc56376-4d5f-4ab4-ac59-93778c5b260b/best_beaten_down_stocks_to_buy_now.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/vurafiliwarerezepalixup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9a71ea-45f2-45d9-9c45-d94a39a74859/38778124558.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_off0000f0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B6 4836 bytes
SHA-256: 71ee2cfffa10c4a57e2273a329faf109c18a8cdd24fcdb91414c9a3a2b9cc477
font_01_sfnt_off00010150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 10728 bytes
SHA-256: bdb34624e5749edd63d111ac15f0da8a881b165b945a5e5808f2214ab2e12648

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