Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70a8cd0e4282999…

MALICIOUS

PDF

92.6 KB Created: 2021-03-09 13:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a3d8e947935fafc548b13d9c3fbcf2ea SHA-1: 5c37a7ad4c5b0cdce650ba50fc21325902e13b44 SHA-256: b70a8cd0e428299916402cf2f0e55e1da76834aaf809c0700afa03745d5c1a1f
126 Risk Score

Malware Insights

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

The PDF was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to distribute malware or conduct phishing. The embedded URL 'https://ponafet.ru/strik?utm_term=how+to+use+a+baby+bjorn+carrier' is the primary indicator of this malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://ponafet.ru/strik?utm_term=how+to+use+a+baby+bjorn+carrier PDF link annotation
    • http://tebeririz.scienceontheweb.net/does_samsung_6200_have_bluetooth.pdfIn PDF document text
    • http://alteramaks.world/76970283441cyxcm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_6028074fbb02c.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/sony_sa-ct780_sound_bar.pdfIn PDF document text
    • http://dalejupoguj.22web.org/the_tao_of_pooh_and_the_te_of_piglet_hardback.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fca0839efc98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_602026168a46f.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/91966414008.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/84282663851.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/allen_carrs_easyway_to_stop_smoking_amazon.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/fogumomi.pdfIn PDF document text
    • http://mirror-x.org/chiari_malformation_support_groups_uk6ai1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445868/normal_5fd68c9333dd4.pdfIn PDF document text
    • http://duplicwcnj.space/champion_8750_inverter_generator_reviews08vw6.pdfIn PDF document text
    • http://reduslim-italia.website/serie_alerta_cobra_legendadoriwnb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_5fd83f28904e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/befafuni/70425547324.pdfIn PDF document text
    • http://lararuzimefusi.rf.gd/24_ghanta_bengali_news_live_app.pdfIn PDF document text
    • http://kixomeremit.epizy.com/gonolowot.pdfIn PDF document text
    • http://bapibalapu.rf.gd/tenuma.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/attendance_sheet_template_ms_word.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/husqvarna_riding_mower_yth24v48ls.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/how_to_test_pressure_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/kujoruwa.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/wikil.pdfIn PDF document text
    • http://woxariwete.rf.gd/takijumapipudesojor.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_off00012e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E01 5132 bytes
SHA-256: 650807ecacb474948de10970ccc757fc7abc52d2cce14fe556c7f2f32657c4f2
font_01_sfnt_off00013f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9E 11064 bytes
SHA-256: 54afb653acf4514549f8e1c48ff65169d0f38b7a23091ef838d046b141dd2e21

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