Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b3e4face53a4a5…

MALICIOUS

PDF

83.0 KB Created: 2021-03-24 17:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: aa1c462d5997c81ad4ecfdefa89118cd SHA-1: 597763cb1e74e81cb6e53125cc77c2f2795be06a SHA-256: d0b3e4face53a4a5772c4148a55854d0628f7cb35f19606e9b00af9cd6a3186e
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 0.9996

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 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://dafemum.ru/strik?utm_term=starbucks+menu+calories+caramel+macchiato PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jupudizadid/razum.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/7870717859.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/akon_we_don_t_care_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/32237688783.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/36029398056.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/febarekejuj.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/love_story_theme_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/jewelijug.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/how_to_add_fractions_with_whole_numbers_and_different_denominators.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_25566b78e6964357b4445cb1106ebf19.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ab9cb0-cee9-455c-8192-e48a5aa418ea/the_book_of_law_crowley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a458df66-0063-4e68-a743-8ae793862094/geometria_analitica_de_ricardo_figueroa.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_fa28f68c21534cada14fb1f7ad6c0cd4.pdf?index=trueIn PDF document text
    • https://93641f3c-03d3-4c8c-b6db-0fd9bfabe798.filesusr.com/ugd/384ca7_1bc759c404794867971f8b3eb9e6ca31.pdf?index=trueIn PDF document text
    • https://235a1a37-2bc9-4d3b-8f1d-d3952ad9fba8.filesusr.com/ugd/3111f7_35900e30d9dc408587856cabcf2588dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lulelepese/ankho_me_teri_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/letter_of_credit_definition_ucp_600.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/3d_pixel_animation_maker_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/how_to_write_a_skills_summary_for_a_resume.pdfIn PDF document text
    • https://893c8be9-d140-4a04-8a3e-66bd54b472cd.filesusr.com/ugd/efd7ea_2ee4532cbabb42de94f3f760ac3caf81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fibesezati/53401932402.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_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 5228 bytes
SHA-256: da97453561187294cea46c93b3305b94d550e8b03b81f720420366140012d52b
font_01_sfnt_off0001078e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078E 11288 bytes
SHA-256: 89cae608b12eb094a91cb9b90b8d3e9bd7c6958dc90b317a35d6db549934e7dd
font_02_sfnt_off00012e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E23 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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