Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c07fdf368ded1d…

MALICIOUS

PDF

93.6 KB Created: 2021-04-15 05:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 11d6d39e1f7c6ffe84d12d4342a0c087 SHA-1: 211cd223792ee68eea2aac46bb5158a183602a2b SHA-256: 32c07fdf368ded1d08dbcd792ab73cabe68ba77e356b65e92d05d266439c20b8
194 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 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=twilight+saga+full+movie+in+hindi+download+480p PDF link annotation
    • https://cdn.sqhk.co/bepemuno/RSELhen/granny_chapter_two_apk_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/nokowifupe/jjiNjco/last_minute_flights_to_miami_from_detroit.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/gPK3giZ/sparknotes_othello_act_5_scene_3.pdfIn PDF document text
    • https://vinaribibivo.weebly.com/uploads/1/3/1/8/131871854/godaponu.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/fidegiwikagidokite.pdfIn PDF document text
    • http://raxojomaman.iblogger.org/afrontando_la_epilepsia.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/WcCjdKg/wild_west_new_frontier_gameplay.pdfIn PDF document text
    • https://sitasujo.weebly.com/uploads/1/3/4/8/134876827/8898125.pdfIn PDF document text
    • https://luloludelipirad.weebly.com/uploads/1/3/5/3/135318650/tuxiluja.pdfIn PDF document text
    • http://luvatok.66ghz.com/how_to_make_circle_tags_in_word.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/7d1ebf8.pdfIn PDF document text
    • https://fijesawe.weebly.com/uploads/1/3/4/6/134630878/tiket.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/4cf2ec36-c8d1-4f92-bcdf-49551eb3491c/xutamanavipevim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5569006-9e50-4a15-86d0-9b84c675205f/t_fal_pressure_cooker_e2_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6751b141-58ae-49e8-8ea8-e264e5fe0192/belawo.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/sepinol.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/hp_photosmart_c5280_all-in-one_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7b9cc4-241e-4d8e-9cba-ef4a40f5bc8e/5482036261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69abfa4d-4281-49de-80c8-806a1e4f5331/craftsman_10_table_saw_motor_rm871.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/mathematical_literacy_answer_series.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_off00012ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBB 5884 bytes
SHA-256: 65a2a9c101f6f792e3c196b173f5efa47fa733f5180320dde4aae2bd89ad75fd
font_01_sfnt_off000142c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C4 11360 bytes
SHA-256: 5b601aafe1a4393de31adc6b01b90764bb9e52fdbeac7ebda591026472bad139