Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4048d6a620cf466…

MALICIOUS

PDF

76.8 KB Created: 2021-03-25 03:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 85508bd6f601e028f16b8301e17616e4 SHA-1: 55b0b3f9ea09fc9728e7e8747ff89d43e481a853 SHA-256: a4048d6a620cf466c245f883fd987a20c2018fae35eab8d1fef4440a835980d9
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 0.9997

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://golowaki.ru/award?keyword=bonefish+nutrition+menu+pdf PDF link annotation
    • http://dragonflysagewellness.com/35094589112yobg.pdfIn PDF document text
    • https://cdn.sqhk.co/penavagalo/SXUAih6/56404844330.pdfIn PDF document text
    • https://cdn.sqhk.co/sepolulegaba/cihigCp/nikiwezejomuvu.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/bielle_manivelle.pdfIn PDF document text
    • http://xaraxag.mypressonline.com/19858974056.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hbJuGBB/kilidezosojasewi.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/giohfJe/idle_magic_town.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/2033516906sj3pa.pdfIn PDF document text
    • http://prizinsta.online/lazosovubseirq.pdfIn PDF document text
    • https://cdn.sqhk.co/xamubana/YthegcP/elemental_dungeon_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/hcibark/jurassic_world_survival_guide.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/08cf1f5e-66d7-4cda-8113-846f33a2e7ce/jivudikewiforek.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/learning_mit_app_inventor_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35a9d98-f360-46cd-a7a5-a2cb3eb88cde/57017996172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ac0bb0-b20b-4889-a1e0-e6b5cbb20ffd/graco_pack_n_play_bassinet_recall.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/usb_wired_xbox_360_controller_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/kubajeluvitimelesip.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/xulowovaboguserijap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bfde2d4-e958-40dd-9dfc-fcd92b57ea02/samsung_galaxy_s9_price_brand_new.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12bff88-4eba-481e-92e7-7e262563c738/nc_drivers_license_test_questions_and_answers_quizlet.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/fender_gb_hot_rod_deluxe_112_enclosure.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_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 5088 bytes
SHA-256: c8df76b90eebceefa754c4a96c7ae9f56137ad80e0eb1750175aae249e0d81e6
font_01_sfnt_off000101e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E6 10648 bytes
SHA-256: c00d7381de19c253c6f500f3d02d9183ce6d01bd086279f51d3c576cbd362325

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