Malicious PDF — malware analysis report

Static analysis result for SHA-256 de49e3f10f3545e6…

MALICIOUS

PDF

75.8 KB Created: 2021-06-13 14:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 64eec34c5f3fa8c2fbc751dcf05bf0a4 SHA-1: f7b8f83d24b63d0097732d03189c9023273158ad SHA-256: de49e3f10f3545e60457d28c64537b0c9594e949fdcd8fa66f1ea98e204bee86
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 0.9995

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://crysiq.ru/pbw?utm_term=the+amazing+spider+man+2+for+android+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456728/normal_60475508031bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418981/normal_5fd786870d148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_600133eac4d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_60c13ba1c375a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5ff1d89d575f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_60b91906c0cc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453100/normal_60079418851a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417040/normal_6058aff9ed6e3.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/f9115366-3257-452c-ab8b-53b6da4ff3a3/how_to_fix_pubg_lite_pc_unavailable_in_your_region.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839156e9-ed82-49ec-9694-21fca621f1d2/degamedez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f62093-ff74-4c5e-8c0b-b915b4f36867/84569059958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924ec66d-607f-4828-9d56-bd3093f169f3/how_to_make_google_maps_my_default_on_iphone.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144744816/how_to_connect_sony_ht-s100f.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecd08f9-640e-47ca-824c-8dfb3df51d8a/dna_structure_worksheet_answer_key_quizlet.pdfIn PDF document text
    • http://noxiwako.pbworks.com/w/file/fetch/144820482/zezagijubatuge.pdfIn PDF document text
    • http://kodalomibika.pbworks.com/w/file/fetch/144797769/physical_chemistry_for_the_life_science.pdfIn PDF document text
    • http://refarumiba.pbworks.com/f/ejercicios_verbos_irregulares_ingles_5_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082b3713-d0c5-44f6-98f3-7f51a2185c5a/62218887292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329c1e85-9d88-4c0d-b15b-8b09870cd87f/rawijunipuxetesegumun.pdfIn PDF document text
    • http://kemuxin.pbworks.com/f/juzumeredebedab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b968b88-783a-41a4-9e09-dce90af78659/pumuzufikisus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4578389-e6d0-49da-8fcb-d99f913f50a1/77424967640.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_off0000dd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD27 5620 bytes
SHA-256: 341f3012d50fab9b3d2eca4c5f82b98033eff62eee0ae1020451ca3e937181b4
font_01_sfnt_off0000f029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF029 21480 bytes
SHA-256: 88dab43ca51999ba7453f03f97cbca199cc653428249f72b296c9adc430c0c2d

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