Malicious PDF — malware analysis report

Static analysis result for SHA-256 31259e4e174091ae…

MALICIOUS

PDF

72.3 KB Created: 2020-12-01 13:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 86c8cd1784ab549dc99ea929d2a5694c SHA-1: c5bb5287f759e2388c18fdeb84835be4c56b9d80 SHA-256: 31259e4e174091aec60a1c8c88536251e1231ed9f046c678285a94bba9fe7986
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, with one pointing to 'trafffi.ru', which is flagged as unknown reputation. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or redirection strategy. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', reinforcing its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm behavior suggest an attempt to redirect users to malicious content.

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 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://trafffi.ru/123?utm_term=the+100+rebellion+plot PDF link annotation
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/9501540.pdfIn PDF document text
    • https://kawepuwaseleza.weebly.com/uploads/1/3/4/8/134849925/mevolilunolutoliwu.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/9d7ef0dc-a743-46bd-b862-c2c0ffdf88f7/29961508852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d10c3b-f7e2-474e-b629-22cec92e55b8/83629814182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b566d7-d6c8-4df0-85e1-3cd41684cefb/91878155597.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/superman_red_son_2020_movie_online.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/damokimipizadolekus.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/bulk_insert_format_file_skip_column.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1175aa879396864096daa/t/5fc5e5f24e98326c02dd2872/1606804978972/date_a_live_3_voice_actors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31063542-0b8e-4f49-b0b6-5e22bce3bc64/come_all_ye_faithful_lyrics_and_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/free_colouring_sheets_lol_dolls.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4fbde18c5c478ef26058/1606373311295/33863507285.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/glimepiride_and_metformin_hydrochloride_tablets_brands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbddbcf7-053c-4d6f-a70a-08187f416538/90234542479.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/76885701136.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/channel_7_tv_guide_afl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9acbeb01-bd56-42f9-bc49-3db206472141/gadomudenugolubam.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_off0000dfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 4800 bytes
SHA-256: 611d4af6ff507187c977fa9b09d5eb26c5250450ff58c264be3606f3530d90d9
font_01_sfnt_off0000f000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 10576 bytes
SHA-256: 2a3776a19eb90006bb9b6ef3e2fdf0356f9cdc62e8dba08b667da7064d0637b2

Open this report in the interactive analyzer, or submit your own file for analysis.