Malicious PDF — malware analysis report

Static analysis result for SHA-256 14763094c4d5a3c7…

MALICIOUS

PDF

89.9 KB Created: 2021-05-19 06:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 082b67335c1efc25887aa845bf2407a8 SHA-1: 547251cecc8f87b82917391fdebb4fb95c7eedd5 SHA-256: 14763094c4d5a3c7f1b4f644fbe5eb4c384236983dbe5a88c52567b884b6972a
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 0.9989

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://leonvi.ru/strik?utm_term=geometry+dash+tool+hack+exe PDF link annotation
    • http://dujopaximejuger.iblogger.org/battlefield_4_multiplayer_crack_2019.pdfIn PDF document text
    • http://gewebud.22web.org/11184014332.pdfIn PDF document text
    • http://fiwuwoxas.22web.org/79016585101.pdfIn PDF document text
    • https://mosawowogan.weebly.com/uploads/1/3/4/5/134511341/8471615.pdfIn PDF document text
    • http://giviwopifa.22web.org/born_free_book_free_download.pdfIn PDF document text
    • http://kimagibasip.22web.org/buchholz_relay_in_distribution_transformer.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/votizejopim.pdfIn PDF document text
    • https://jidegumot.weebly.com/uploads/1/3/0/7/130776526/5051570.pdfIn PDF document text
    • https://velazidolis.weebly.com/uploads/1/3/0/9/130969689/kekofekegesonoda.pdfIn PDF document text
    • https://sasominafa.weebly.com/uploads/1/3/4/3/134362810/bavalid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vituzitozitu.epizy.com/ambersil_acrylic_paint_msds_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4706bd0e-32bf-4a27-9d95-21df4c9a1a71/35704675810.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/famous_jane_jacobs_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c7d0c24-d8f0-4788-914d-0cc70a0abd74/sezixako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce31aa8-0c0e-4a76-a891-f00d6b6274ab/tv_pitch_deck_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe04cba-bb77-4771-9c81-52a28dd70404/dremel_4200_suddenly_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4b5a7b-12ec-4d69-8a16-088b9257dbb7/argumentative_essay_topics_for_secondary_students.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/hp_p2035n_printer_specifications.pdfIn PDF document text
    • http://bogurivesinoni.rf.gd/case_study_master_thesis.pdfIn PDF document text
    • http://vekizuzo.rf.gd/brassica_juncea.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/perisuluni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ed040e-59df-4e54-bd7c-32e4e201acae/30006134404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cea56e8-61fe-49c9-9178-2baeb48fc84e/zetozovuludilelujunaz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A55 5444 bytes
SHA-256: 41346350abad6fde7aa546c5a42527874b793c4dc9a4755c8927ab99dbb7240d
font_01_sfnt_off00011cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB6 11608 bytes
SHA-256: a33d35f2e743ed5399afb2d60d612641dc4fffc571bf175673c34abbb5c038ec
font_02_sfnt_off0001446c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446C 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995