Malicious PDF — malware analysis report

Static analysis result for SHA-256 445d8eb04ffe4dfd…

MALICIOUS

PDF

76.7 KB Created: 2021-04-03 13:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1d42502fdacb101692df99dbd5198f42 SHA-1: 920f7d40c2c07e59c5a61f26fe49ad3ac32af9db SHA-256: 445d8eb04ffe4dfd19c28a1d973082a835529601e2651aa067fc22615fb8ef88
134 Risk Score

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 0.9956

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 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://jottigo.ru/123?utm_term=indesign+free+template+newsletter PDF link annotation
    • http://labifovejes.mypressonline.com/1916776719.pdfIn PDF document text
    • http://zitukuwekoba.sportsontheweb.net/important_days_in_malayalam_download.pdfIn PDF document text
    • http://xomatisuxutu.iblogger.org/39793762491.pdfIn PDF document text
    • http://resapus.scienceontheweb.net/71806046786.pdfIn PDF document text
    • http://bamiluzigu.mygamesonline.org/auditing_principles_and_practice_download.pdfIn PDF document text
    • http://kukogekaw.sportsontheweb.net/voxogofeje.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/adobe_reader_free_download_windows_xp.pdfIn PDF document text
    • http://gazagidumow.mygamesonline.org/jafaposirebufim.pdfIn PDF document text
    • http://riwepetu.iblogger.org/chief_information_officer_executive_certificate.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/zewimu/is_one_acre_the_size_of_a_football_field.pdfIn PDF document text
    • http://fojamemu.epizy.com/85161835431.pdfIn PDF document text
    • http://selusibe.epizy.com/sekipadamamoruzasi.pdfIn PDF document text
    • http://divupovive.epizy.com/dyslipidemia_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/67455491237.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/povujogojupep.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/59341533858.pdfIn PDF document text
    • http://fizenigapajawak.epizy.com/bladen_online_crime_report.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/buku_akuntansi_manajemen_rudianto.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/viper_turn_off_valet_mode.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/british_english_words_list.pdfIn PDF document text
    • http://moxosutemow.onlinewebshop.net/fotove.pdfIn PDF document text
    • http://gofudawaropuz.epizy.com/isaac_asimov_short_stories_collection_crossword.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/arabic_ocr_from.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/what_comes_out_of_a_pimple_when_you_pop_it.pdfIn PDF document text
    • http://dowafirowelumex.atwebpages.com/besikikigixudifap.pdfIn PDF document text
    • http://kopolug.myartsonline.com/16046327398.pdfIn PDF document text
    • http://geperazal.epizy.com/2729732291.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_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 5392 bytes
SHA-256: 24f1e36ac46511b0489d68f026d1f161a3517458f67d7fe690bb2b22d4872445
font_01_sfnt_off000100d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D2 10692 bytes
SHA-256: da068a202dd12a8f43fd54add9e51a7aa01b13ae099885faa75a85c50a0dbd7d