Malicious PDF — malware analysis report

Static analysis result for SHA-256 6087336791798d3c…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 16:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59b64922044c99250aa42ddb2bbce0a0 SHA-1: 362837625df00bba6550d38daa82408339715fc7 SHA-256: 6087336791798d3c5ba5fa048c57ba48aca2c49032172105648203fe1129930f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://dafemum.ru/award?keyword=cardiovascular+pharmacology+for+nurses+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368991/normal_60334da6ea568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_604a914fad5b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_60467822a04fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_603a4d3027eb9.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/igjgehf/red_ball_adventure_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/ighapgg/small_business_loans_dallas_tx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_6030a37f61b32.pdfIn PDF document text
    • https://vanufutalolu.weebly.com/uploads/1/3/1/1/131164160/reluzo.pdfIn PDF document text
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/e095c65ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486565/normal_600cf4474c977.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/bFbrhiO/xotonusonaxep.pdfIn PDF document text
    • https://nakaporona.weebly.com/uploads/1/3/1/4/131438848/wovidazux-nobotuj-tijifute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_600c1ab4de974.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/56a4e0d9-0ab7-4a97-ba4c-4e1abd8925c4/jerarquizacion_de_los_valores_max_scheler.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_5bf90478215e40c283268824d97892d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eaa6aed-7168-4a43-946c-a0ca0931bbbb/quivalenz_1_norm_2_norm.pdfIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_e12b9984adb5433ea89de6e34c3be423.pdf?index=trueIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_4201ed94edfd4d908cd47ee076fc5efe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f994018c-0d2f-44b4-980e-05aae1bb5aea/game_of_thrones_books_ending_vs_show.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 5636 bytes
SHA-256: 3156b72a8c38054452a766b94e7ced86a063fe9fc2450ae687a7c3989fbe1a03
font_01_sfnt_off00010f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F71 11312 bytes
SHA-256: 2481ec4fac0ad8029777c3de58b14d8f7fc89ed949165dfad08298231164b267

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