Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7fefeaf0151f86…

MALICIOUS

PDF

75.6 KB Created: 2021-03-17 18:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2b25b68ff3a3b6236fa6f34fe3618d0d SHA-1: 9d12fed2a9ef5e735d7ff80a5f7f78cc3a53538a SHA-256: 0c7fefeaf0151f86068931ea91d2be9a2b59bc15d46b164fdbee13dd9ca2e67c
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=algebra+1+workbook+pdf+with+answers PDF link annotation
    • https://cdn.sqhk.co/wejawujagi/rjfM1ji/beluluxizivukufeder.pdfIn PDF document text
    • http://silver35.ru/how_to_do_a_filter_reset_on_a_samsung_refrigeratorzs1qe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_60063f5e204d3.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/Fhihehe/lord_shiva_animated_images_hd_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_6023f595b58a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_6005829bebcfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452851/normal_60283baa76ae6.pdfIn PDF document text
    • http://procripton.com/511466932522abn3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488323/normal_6016e7cf25caa.pdfIn PDF document text
    • http://meinekarten.best/inversor_abb_100_kw_datasheettkwzw.pdfIn PDF document text
    • http://moitender.org/88283166402d21bo.pdfIn PDF document text
    • http://netlysy.online/bellsouth_t-_388_manualuapl5.pdfIn PDF document text
    • http://revershjtb.site/beginners_movie_in_tamil467xc.pdfIn PDF document text
    • http://amst-watch-v1.club/level_2_football_coaching_session_plan_templateq0non.pdfIn PDF document text
    • http://raifaisentgo.online/suzuki_violin_book_4_piano_accompanimentx1qyb.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/d18f93bd-45d5-4f0d-acf2-e3fd005646aa/kasakuvakivexafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93da59e-7b6a-4fee-b2de-c0b62c5e4dba/18294430654.pdfIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_275f39392cf64fe4a26aecf01e8e5d7e.pdf?index=trueIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_3aa6da7e7d5e44ce9e18b7a1bd333b2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2802b1c-38de-4595-819e-caa41854e6f2/kiffe_kiffe_demain_english_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f404016-2a47-4aeb-94d8-12c61aa1c11c/82010039011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02ff11d-1bd0-464f-b784-1cbca2b9a708/pisakugixepedazukamijased.pdfIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_cef8079105fb4ddba23513a12aac889b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C0 5640 bytes
SHA-256: 8dd7d99791012e22995eb4820eabbee1ed3949b5704f5655c6a6739ef288af36
font_01_sfnt_off0000fc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC03 11108 bytes
SHA-256: d455e4bae2998472ae57a226a394340f19933860dc578161a0cfc31ae6a62997

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