Malicious PDF — malware analysis report

Static analysis result for SHA-256 282a262f0bbddf3a…

MALICIOUS

PDF

72.1 KB Created: 2021-03-26 06:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 967c7a2717468fb999d7292ad09fd4d7 SHA-1: e9440ba2fc9a4b15b1cd77b341da7a1bed322f6e SHA-256: 282a262f0bbddf3aa1b22209bfd84a03de23db216825618697561ef312d25d04
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://golowaki.ru/123?utm_term=black+screen+background+android PDF link annotation
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/5514466.pdfIn PDF document text
    • http://doporujela.iblogger.org/nijulazeguregapu.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/fda966cdd7b0.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/past_tenses_advanced_exercises.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/zoology_books_free_download.pdfIn PDF document text
    • https://xetiwomojebiwif.weebly.com/uploads/1/3/4/7/134714835/duworiz_ruberojufowol.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/daily_bible_study_guide_2020.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/8c7a83328cc1.pdfIn PDF document text
    • https://zotamitogimida.weebly.com/uploads/1/3/0/7/130775261/taretes.pdfIn PDF document text
    • http://dududuw.mypressonline.com/kuseketopuluduzu.pdfIn PDF document text
    • http://kozizukexepuf.22web.org/concrete_and_abstract_nouns_worksheet_5th_grade.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/536196c2-04e7-4df4-ba30-836e0c1e43c9/38597266462.pdfIn PDF document text
    • http://romakilax.myartsonline.com/40954996406.pdfIn PDF document text
    • http://vujadexofon.atwebpages.com/advanced_mathematics_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b0b7c7-4146-4df6-ac7e-f2723212061f/sojuzoxikupudupil.pdfIn PDF document text
    • http://mujujum.epizy.com/3ds_emulator_windows_7.pdfIn PDF document text
    • http://jujuletofu.onlinewebshop.net/66396102170.pdfIn PDF document text
    • http://tosurok.myartsonline.com/rejobugedujimipejusebese.pdfIn PDF document text
    • http://vujujejinegu.rf.gd/5591389797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a112740-1ab5-40d3-b2c7-71892737d0b2/98762311220.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/callan_method_spanish.pdfIn PDF document text
    • http://kapetevik.epizy.com/reportage_homopathie_france_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba90d01-35b1-4c90-bedc-b99d1c4a00c3/78420106380.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_off0000daa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA5 5360 bytes
SHA-256: 5fd9a04729af6a00cf68495ecdd51505c5d1f1f62c0155940349307d199a5dac
font_01_sfnt_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 11124 bytes
SHA-256: 872fbdda1cfa3a4b0cd9572d9f8caab5d3070643d6a8d5782ee7954baf7e12e5

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