Malicious PDF — malware analysis report

Static analysis result for SHA-256 b130e4f26f61fd1d…

MALICIOUS

PDF

92.4 KB Created: 2021-03-31 13:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b990267d9c971cfab07c8d36ce1b5f4f SHA-1: 50a78eb16cc9c8cae8b7b125eadd300ace76e281 SHA-256: b130e4f26f61fd1dd076ed35ec0c487adde7e691257653cdf363e16e914cc013
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 0.9988

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://lozipotod.ru/wix?keyword=new+google+sites+sign+in PDF link annotation
    • https://cdn.sqhk.co/fekoguwiwu/Jihchau/screaming_bird_at_night_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/hjJjjyq/exercise_bouncy_ball_with_handle.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/metro_route_map_delhi_2020.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/tipofenarudezapavulemej.pdfIn PDF document text
    • http://viwoxufegoger.sportsontheweb.net/30290017448.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/Igigghg/xovegetisa.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/hecjcge/22111412108.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/dgf1ifY/sword_art_online_games_ranked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rebomedug/60115890082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4092692-f1c7-44a5-8dd8-ecf45eebd61b/48093701147.pdfIn PDF document text
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_aecab0621db94a0f863840fdd63f7ada.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37505d24-1be8-4d41-ab2e-7fcacb0c1af9/gonotadezigifatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5202161d-75cf-4b4f-8889-3710d7340d2a/82058460357.pdfIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_b4892bcc4d3c44889940b126d225105b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/aphrodite_story.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/html5_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/45748905941.pdfIn PDF document text
    • http://jadivepijuga.myartsonline.com/44083918182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4caf2d-3119-4efd-8bb2-8abd714b8282/pugatuwidawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca68ffc7-ffec-4e33-a443-c4142c2e3538/is_stargirl_cancelled.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/watercolor_landscape_book.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/gesobigetop.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/vidijitug.pdfIn PDF document text
    • https://e72deea9-3c4d-48de-8429-d2e8e2d5d9b3.filesusr.com/ugd/68b2df_2f1916953bc24567b2719604bafd4a5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fazujo/cards_against_humanity_packs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD246 30672 bytes
SHA-256: 2375d88131b5e9b3b89c98b3b1f191b0a9b7136b9e579a891a3b53624b4940be
font_01_sfnt_off00013158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13158 4608 bytes
SHA-256: db7a4ef1ba85b67e6ff50b889f5c7887b7b6258ec0f85e6feb49929f1fc549c7
font_02_sfnt_off0001413c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413C 10112 bytes
SHA-256: f42d374304b2c58503c5e8d791fe9f7e3aa7cf51574ead69ef0f243c5b1f3cb3

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