Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a687eba1eab83ee…

MALICIOUS

PDF

75.6 KB Created: 2021-03-29 03:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b53a5d6b4626b6e0e56b0f2f48d0ffb6 SHA-1: 8e438005e094a342430f245a6735793b128b945a SHA-256: 2a687eba1eab83ee8a6e8928e25a02845534fc247b0c0b6ba493f346cab0c84f
126 Risk Score

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://leonvi.ru/wix?keyword=meiosis+and+mitosis+worksheet+doc PDF link annotation
    • https://febavezexiwajo.weebly.com/uploads/1/3/4/7/134703432/b78f7.pdfIn PDF document text
    • http://lupuneruw.iblogger.org/add_in_excel_2020.pdfIn PDF document text
    • http://zoxifowivo.iblogger.org/takafuxekitajafimamav.pdfIn PDF document text
    • http://fozivot.mypressonline.com/amelie_sheet_music_book.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/zusovalo.pdfIn PDF document text
    • http://zuvibig.22web.org/mubajixagabikisuxevixet.pdfIn PDF document text
    • http://sojurufo.iblogger.org/bornier_wago.pdfIn PDF document text
    • https://dipofivebizog.weebly.com/uploads/1/3/2/7/132712563/vazoxe.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/nekezafukuzivabawisa.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/bergeys_manual_reference.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/jofugi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixevefosado.epizy.com/what_is_the_weight_limit_for_a_mini_trampoline.pdfIn PDF document text
    • http://setimuduwimu.epizy.com/franz_kafka_the_metamorphosis_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9306b4-f501-4c62-86c3-9b8f7b7beef0/how_to_calibrate_taylor_kitchen_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a7be2a-0799-4e26-9d3c-240301a27dee/does_comcast_have_bounce_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662ddd27-4951-41be-8006-84eb09158858/sea_ray_200_select_owners_manual.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/les_objectifs_de_l_amnagement_du_territoire.pdfIn PDF document text
    • http://depuniwawugupi.epizy.com/hamilton_beach_22_quart_roaster_oven_fits_28_lb_turkey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ddbeea-75fb-4667-a3dd-2957cf82c19e/3618221002.pdfIn PDF document text
    • http://vunefukovamin.rf.gd/pisutupogesu.pdfIn PDF document text
    • http://nepunefetonub.epizy.com/coast_guard_coxswain_study_guide.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/92829048417.pdfIn PDF document text
    • http://kamigawox.atwebpages.com/b_arch_2020_question_paper.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_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 5308 bytes
SHA-256: 8e04717e93175b8e56af171c6e4a767a27169322b211411af612e4f24ed02034
font_01_sfnt_off0000fd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD33 10528 bytes
SHA-256: b57772a2d72ab1603d8d67d953cb74488e0ea9d941b64ddfb93e2034f827f1c6