Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e2c03ce84bcd44…

MALICIOUS

PDF

77.6 KB Created: 2021-04-01 05:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0d430352427a368e3da1c72d6c2b8913 SHA-1: 1265cb414f7d6b433b1bb162e0f3b02df4cb3809 SHA-256: 86e2c03ce84bcd44605c4e755990d63a97a4d1113581adaa655212637318d6be
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 0.9998

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://zajinet.ru/strik?utm_term=how+do+i+reset+my+netgear+wifi+extender+wn3000rpv3 PDF link annotation
    • http://zaliv2k20wowowowoow.xyz/53175182156oaf0c.pdfIn PDF document text
    • https://cdn.sqhk.co/mujutuzidip/ZgiB3hd/lenovo_thinkpad_x1_carbon.pdfIn PDF document text
    • https://cdn.sqhk.co/mezugifosa/gz0Rjgf/bikavenazomusalel.pdfIn PDF document text
    • http://segwaywheelchair.ru/what_is_alpha_alphabetxv66p.pdfIn PDF document text
    • http://formblckr1.xyz/youtube_how_to_thread_a_vintage_singer_sewing_machine3z4ag.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/gbSgfif/ryans_world_bubble_shooter_game_download.pdfIn PDF document text
    • http://alex-chekalev.com/barbecue_ribs_recipe_instant_potqnkuk.pdfIn PDF document text
    • http://flymoney.net/classification_des_animaux_cycle_3_trace_critej8re7.pdfIn PDF document text
    • http://salonly.xyz/ferodiganidawiwetaztccy.pdfIn PDF document text
    • http://wobixoka.66ghz.com/88551516743.pdfIn PDF document text
    • https://cdn.sqhk.co/xifobariw/fgewobs/new_song_neha_kakkar_ka_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lokojagivel/apjhjrJ/best_call_recorder_app_for_android_2017.pdfIn PDF document text
    • http://pitushok.space/zivuvelusojesefobipumupixdhv4u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wivifizurata.epizy.com/billboard_top_100_songs_2018_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d73fd6-6ba7-457e-8d6e-ded3814426f0/world_without_flowers_interesting_things.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/972285ee-bccf-4cff-835d-559146a6dee8/good_maths_apps_for_7_year_olds_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ea6eee-e533-40e4-a61a-cee5d7c83b49/yamaha_dgx-620_piano_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f60b66-6704-465c-b62b-81f6b198d6a4/58448631290.pdfIn PDF document text
    • http://kujofumuv.rf.gd/como_aprender_ingles_rapido_y_facil_en_casa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0796c8dd-07bb-49c5-9ab1-61c47b62bf17/how_to_fold_paper_storage_box.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_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 5920 bytes
SHA-256: 9c21c8c171b44a17ef4495c266b088f736673beffb74eb7f0f0987a91fd30e17
font_01_sfnt_off000103d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D9 10824 bytes
SHA-256: ae6aa6e23c23f98f5ce63abf8c157a72b842ab27ac2abbf8a2afba483c8fd9b9

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