Malicious PDF — malware analysis report

Static analysis result for SHA-256 1968881adf98a0b9…

MALICIOUS

PDF

115.5 KB Created: 2021-03-31 22:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 23ee8ba52723245a89e8bfcf05af6fbf SHA-1: 5766d1599821f7cce493720ddff58be8696ceba0 SHA-256: 1968881adf98a0b97de554b3c331f74b72c9cf449597e6d1d432d94fc90f08df
156 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 0.9997

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 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.
  • 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://ponafet.ru/award?keyword=how+to+improve+oratory+skills+pdf PDF link annotation
    • https://cdn.sqhk.co/puwipaneke/kjaiajK/best_whatsapp_dp_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vumulevezuf/hdihSgS/71259240136.pdfIn PDF document text
    • https://cdn.sqhk.co/tajavujexiz/8yiKgee/defender_hd_1080p_4ch_with_4_bullet_cameras.pdfIn PDF document text
    • https://cdn.sqhk.co/gezewakofi/i7gd3ja/hacksaw_ridge_movie_in_tamilyogi.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/IcjfhjJ/how_to_draw_cartoon_zombies_step_by_step.pdfIn PDF document text
    • https://cdn.sqhk.co/jabezoxujo/jjfgjjd/tuzexalemasolakaxiku.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/eymMjge/food_wars_season_2_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/hahfgiz/vr_haunted_house_3d_apk.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/2d73dd40-231a-421b-8d69-2d8a73db9564/fe_other_disciplines_review_online.pdfIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_3388aafbfcc1477394925caaa71953b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce118b2-ea09-4507-b9d2-a344f2d42279/56281034505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48030be-01ef-4a3c-8bcb-9bbb42cb600f/25961269843.pdfIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_17be9147a6014203ad0abbf99723f108.pdf?index=trueIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_74218871630a431f91e192daf6e0d6da.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f7a64a-d4c4-473e-9c67-26b7b6e62630/warriors_the_last_hope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319f9893-b83c-4e2a-87bf-ab5175e2d800/75586473134.pdfIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_cced1ab23e1a4b0fbb7f12c358bc862e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07bb3555-d204-46cc-be2b-6ecb14579976/vadoxuvarabijox.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_a6aa91b15aab4f4cad594968e2fb52a2.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_off00018866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18866 5468 bytes
SHA-256: 90d859445fca0925c368d33796af30e92fc459768bb840c13493c51de84de98e
font_01_sfnt_off00019b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B02 10900 bytes
SHA-256: d5d35ce45718da60632f1ea752c29e17ab8e5b4f8b18b95aeef25f2d690a0d3c

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