Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7421fb05e215959…

MALICIOUS

PDF

154.3 KB Created: 2021-03-19 06:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f18259efee6427c0b608c14bf86aee8b SHA-1: 598ffd0947507690eb6671c970ec9acd8f6e77da SHA-256: d7421fb05e215959cfeea64f56027f3cf28831c28c400e604c0557e1ad307876
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 0.9953

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/123?utm_term=gantt+chart+template+wikipedia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fcd0376bd3b4.pdfIn PDF document text
    • https://fabegobidik.weebly.com/uploads/1/3/1/4/131437275/kevodu.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/jolirad.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/getenuloxamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_604d0d710b2c9.pdfIn PDF document text
    • https://sarajigirokoxi.weebly.com/uploads/1/3/5/3/135300612/5026830.pdfIn PDF document text
    • https://cdn.sqhk.co/zanaforare/gjo8Hif/the_onion_knife_launcher.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495262/normal_6003534d50786.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/hc9eghj/vikings_war_of_clans_review.pdfIn PDF document text
    • https://minoximamus.weebly.com/uploads/1/3/1/4/131437876/zofogonogopori.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/meludav/book_of_jubilees_why_not_in_the_bible.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_42c855d9ef834546853ac7f5bc789f2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/techno_gears_marble_mania_crankster_2.0_instructions.pdfIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_24f0990e342f4468b21380a0819f018d.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_dfedf8be765e43d1be71b7b0af5937db.pdf?index=trueIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_40cdc5f4e9cd40969abecc8c85f24fdb.pdf?index=trueIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_5d7de2982e054828a61a131204652dd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/dj_doll_remix_album_song.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_cff14b035b9445f99d0edcc41c5d7af9.pdf?index=trueIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_b7579eaa135e402cab4c7dc343f11c3d.pdf?index=trueIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_9487a566e38e4f22a2b172f1cc19565f.pdf?index=trueIn PDF document text
    • https://8d9f32f1-468a-4e6e-8fd0-236262902e57.filesusr.com/ugd/28860c_d8d9c20a5598448c8ff62ec6c3b29195.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17B 84004 bytes
SHA-256: 9a09b81720d034d5b2270db5cbbd876a8bff8d95d410d5ed89708a6fb9a31fc9
font_01_sfnt_off0001eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB7F 5000 bytes
SHA-256: e96c9a29b7b41f332e208a060d0053f86da672183611b321771edd55efa0f943
font_02_sfnt_off0001fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC53 4832 bytes
SHA-256: cd89da108a6592888ff362db7c5b3c5396bc54b93303edcd3a0ef24fa5b6fc00
font_03_sfnt_off00020e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E20 11232 bytes
SHA-256: 3475e0501efc62c3d7e87141109f580e3c3f33de61ac76e6ea199f32f74a1862
font_04_sfnt_off00023500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23500 16068 bytes
SHA-256: e7273338525a866f49bd556f13a0e46ce1e8513f85f175d9d987aa1f8b89adb9
font_05_sfnt_off000249a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x249A4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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