Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1805f57bcad3110…

MALICIOUS

PDF

72.1 KB Created: 2021-03-13 14:37:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4d8de3c3928fcf02f51e0d84a3d3dd3c SHA-1: 9443469f825bd67b9ca821cfbd30ef8f9e4f3e3c SHA-256: a1805f57bcad31102f7370df723dae3437fccbf1a0d71b80f81d2cac4fba6dec
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wix?keyword=life+span+development+santrock+pdf+free PDF link annotation
    • https://cdn.sqhk.co/kajutizikodu/ib2NP4g/kim_kardashian_hollywood_hack_no_human_verification_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/gjihfhe/kakuba.pdfIn PDF document text
    • http://vovpomnim.ru/animal_sounds_worksheet_with_answersn0pwm.pdfIn PDF document text
    • http://cetapp.xyz/89515868214zuwyb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449392/normal_602ebd9f212f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5fc5f518dcf24.pdfIn PDF document text
    • https://cdn.sqhk.co/letabuner/Mjgehi2/backup_plan_document_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_60336b791aa4c.pdfIn PDF document text
    • http://hr-insider.com/hansteen_holdings_annual_report59v1o.pdfIn PDF document text
    • http://chtotakoevuxom.biz/what_is_the_full_version_of_the_serenity_prayertiw83.pdfIn PDF document text
    • http://dsv-trening.ru/minn_kota_riptide_powerdrive_v2_i_pilot_upgrade_kit02pab.pdfIn PDF document text
    • http://ssurll.com/10ipvdIn 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/b5077fb4-11b2-49d8-b557-6989613f309b/vuzodivozonivi.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/melexogejezisumevovinix.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/disidudida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1297cb7a-88e6-468b-8921-1b6369c005ef/lord_i_need_you_right_now_lyrics.pdfIn PDF document text
    • http://vipiwimepi.epizy.com/22715118432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e48057-dbe6-439c-8122-eea52265df8e/cuales_son_los_pronombres_personales_en_ingles.pdfIn PDF document text
    • http://safefimij.epizy.com/nikalekofutolibajoxibe.pdfIn PDF document text
    • http://sawujasasit.epizy.com/woxokuwoberitedibu.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_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 5364 bytes
SHA-256: 413b4fd5373e7f372e60c148eca692c7af268f4e29b2732ef648babe6bd5111a
font_01_sfnt_off0000ef08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF08 10572 bytes
SHA-256: 265c47d1f2ebb2861c503c592bd3fd4f000334a9e74e3636b1b202868059d883

Open this report in the interactive analyzer, or submit your own file for analysis.