Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bd1d8b51710b1b…

MALICIOUS

PDF

80.6 KB Created: 2021-03-17 23:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fe379884704faa9ec69066a32c1b0f4 SHA-1: 75136009a362cdaf70577e097f166e994dad2647 SHA-256: 96bd1d8b51710b1b0ea67c4f7d6ac4d75e230b9da12d928393727f1afaf8857c
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggests an attempt to direct users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or malicious redirection scheme, possibly leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/aws?utm_term=sony+vpl-hw40es+lamp+life
    • https://cdn.sqhk.co/tosobulig/gQkzjaU/24528623285.pdf
    • https://cdn.sqhk.co/totafeta/jc6igwL/maxofinafeminimeruvomi.pdf
    • https://cdn.sqhk.co/muvenetu/rhahdhf/power_wheels_jurassic_world_dino_racer_canada.pdf
    • https://votebefi.weebly.com/uploads/1/3/4/7/134715150/fowogipudoki.pdf
    • https://cdn.sqhk.co/jesovolavig/ieUiajj/lemowobovox.pdf
    • https://tufamivobanode.weebly.com/uploads/1/3/0/8/130814219/wubapifekudujuz-bukuwuviwab-fojabirojo.pdf
    • http://juwupexutaval.mywebcommunity.org/why_is_my_tv_screen_have_lines.pdf
    • https://cdn.sqhk.co/pizokifuxe/SBjc46I/ant-_4g-_omni-_out-_n_data_sheet.pdf
    • http://sugameloxufe.mywebcommunity.org/89808753130.pdf
    • https://cdn.sqhk.co/tosilura/sWnWidU/motarupawadem.pdf
    • https://cdn.sqhk.co/fopikudapom/ahiigSr/lego_marvel_super_heroes_ps4_price.pdf
    • https://tatabano.weebly.com/uploads/1/3/4/8/134850833/fc45c815.pdf
    • https://cdn.sqhk.co/zepipawetopi/8ggyjf9/gluten_and_dairy_free_carrot_cake_recipe_uk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b6b7d70c-95ee-46ce-a1e1-40c1508e85ce/66859452175.pdf
    • https://s3.amazonaws.com/rebesudanolo/51686033345.pdf
    • https://s3.amazonaws.com/kotodur/pegisop.pdf
    • https://uploads.strikinglycdn.com/files/b8b7c7ba-bfa2-4940-b5bd-1b071c637823/bobafulukapudujup.pdf
    • https://s3.amazonaws.com/fodose/73784357264.pdf
    • https://uploads.strikinglycdn.com/files/1c0d5667-41ce-43fb-a18c-db4940733fc8/how_to_turn_on_hampton_bay_fan_without_remote.pdf
    • https://s3.amazonaws.com/xeponodij/define_project_portfolio_management_computing.pdf
    • https://s3.amazonaws.com/sizadagazagaj/fdny_forcible_entry_training_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee49.bin
527fdd529d977fe1148d2d1e741fa7c4bf87f06350c9ef893f7b0b70a3705ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 5372 bytes
font_01_sfnt_off00010073.bin
b2d455facead64e23a3d71db45d217f7f71260c5e0bf0eb7e33ef22a1bbfdca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 11392 bytes
font_02_sfnt_off00012742.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12742 4324 bytes

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