Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36a73009080bb11…

MALICIOUS

PDF

77.9 KB Created: 2021-03-04 22:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1decf821c563e480243821e34627bae8 SHA-1: 9db1a7c0b1b4751692ae458d45f39ad1c0d87fe0 SHA-256: e36a73009080bb11226a6fe7488f6f2d916b8335dc684950bd54270431e1cf71
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/123?utm_term=dometic+rv+refrigerator+troubleshooting+guide PDF link annotation
    • https://cdn.sqhk.co/lejesapazud/XUFMaia/avatar_factory_2.pdfIn PDF document text
    • https://cdn.sqhk.co/wafixagi/jfBooif/bikefogo.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/M4hehfj/44695576859.pdfIn PDF document text
    • http://giocodigital.fun/forms_of_casarse_in_spanishljiar.pdfIn PDF document text
    • http://bonboxstudio.com/android_app_development_course_in_punehgqc0.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/egdohjb/used_atomos_ninja_v_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/wofosavafiju/idhagc1/pirate_craft_template.pdfIn PDF document text
    • https://fevonijapa.weebly.com/uploads/1/3/4/2/134234837/walituralorusunelo.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/86875737233.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosozos/3ig9eij/words_with_friends_2_word_game.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/jaieWU9/31541295655.pdfIn PDF document text
    • http://islemleriniz.org/kinixenujid5d410.pdfIn PDF document text
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/bogerakix.pdfIn PDF document text
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/8572805.pdfIn PDF document text
    • https://povilaromegew.weebly.com/uploads/1/3/4/4/134486615/tetitegisida-deselu-tefikame.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/cXLQ8ig/real_car_extreme_driving_simulator_2020_car_games.pdfIn PDF document text
    • https://kadamoxezegawuf.weebly.com/uploads/1/3/4/3/134347408/notitajadabejita.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://uploads.strikinglycdn.com/files/3742a117-0bd6-4d79-a18d-180a4a27569a/duxawabefuloninoxobepar.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/dsl-2750b_firmware_download_eu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1cb74b6-3d4d-4fd9-8be5-0e66fbc75723/retezatolamewedutezesifev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47C 5516 bytes
SHA-256: 8976a3f8ec4cdacc525d2a057f16daee01113ac34993be4d730edcfcfd3a8bf4
font_01_sfnt_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 10824 bytes
SHA-256: abd128bcd1244227c4eae457cb19db98edaf4ff933caae76e33d77b563aea60f
font_02_sfnt_off00011be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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