Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e1dd7f0f06c5cd…

MALICIOUS

PDF

68.6 KB Created: 2021-03-11 05:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6ff5b578161cce3a38391250af7fe954 SHA-1: 5d2e0086a62b344deefac7839731bce30dbd3c04 SHA-256: 45e1dd7f0f06c5cd86b65b0d13ee5f1e2c7f749d6e7d918246d2784e9cc8b960
186 Risk Score

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 0.9993

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=lamberghini+full+song++320kbps PDF link annotation
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/vurili.pdfIn PDF document text
    • https://fukenotaza.weebly.com/uploads/1/3/2/7/132740373/tujesiti.pdfIn PDF document text
    • http://subfamjtii.site/vw_service_manual38ne7.pdfIn PDF document text
    • https://figowemepiwe.weebly.com/uploads/1/3/1/3/131398533/2350640.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/86050844939.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/certificado_de_calidad_aceros_arequipa.pdfIn PDF document text
    • http://medyayazilimtr.com/kupumetezakuli5wn.pdfIn PDF document text
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/0d572f6fa.pdfIn PDF document text
    • http://vittorguxx.site/sample_project_concept_noteiq718.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/xupodoxejufulepoli.pdfIn PDF document text
    • http://pirojibanenuzi.getenjoyment.net/camping_knots_book.pdfIn PDF document text
    • https://bexulijariva.weebly.com/uploads/1/3/4/8/134885506/c2aac0032ea.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/wupagivoz/how_to_change_oil_on_honda_mower.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/burnaware_free_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd555f2-5d2a-452a-b252-5bc52778d243/what_can_i_eat_on_the_21_day_daniel_fast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876a4406-ccdb-4263-92ab-29f3cb3dea2e/wisoxug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e68366-53f2-443d-bdd0-725ac77da6fb/how_to_put_oil_in_a6_ac_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e26388-5d1f-4bf8-9c42-07cbdb59c55c/where_to_buy_west_bend_stir_crazy_popcorn_popper.pdfIn PDF document text
    • https://d668ac4b-7052-46b9-8d0c-7e282d24ced7.filesusr.com/ugd/00fc84_9f398241145a4277a6cb6836bc3fb33e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/tolov.pdfIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_826e2a31c69d4ca5ba0a9ae930ca2c52.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d14ddea-bba0-414d-9db2-a980fc5aa44e/bergeys_truck_centers_trenton.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/alto_s_adventure_zen_mode_piano_sheet.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_off0000cdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD6 5900 bytes
SHA-256: 4098d8ae3768016a14aaa7b8cdcf6606b7617ee10718157ff6ab3d0b6675f3e7
font_01_sfnt_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 10368 bytes
SHA-256: e978398bf013fe2cb3c0b358eaff55e8ef6310f69d030e4f4264c25c61bf1910