Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac5d96b8122e14c…

MALICIOUS

PDF

68.2 KB Created: 2021-03-21 04:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e924a6fdf72787e980ace165ae08d448 SHA-1: 2f155cefff31546d64bb5d3f80938be5a7b9ff4b SHA-256: fac5d96b8122e14c6e9ab00c65a4e6b3002c83b20aa9b4af52d525bdf2570409
126 Risk Score

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 0.9992

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/123?utm_term=auburn+tigers+coloring+sheets PDF link annotation
    • http://mapugukabazewu.scienceontheweb.net/80132230181.pdfIn PDF document text
    • http://zinefikitozozeg.sportsontheweb.net/b_v_rao_world_history_free.pdfIn PDF document text
    • http://gopagafab.medianewsonline.com/marathi_marriage_biodata_download.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/55410556137.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/rjaRjeY/billie_eilish_wallpapers_animated.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/AxDU4if/facebook_lite_download_for_pc_apk.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/lotenid.pdfIn PDF document text
    • http://didazema.mypressonline.com/butedalatirasinilebekab.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/ut9gcja/24296158646.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/9596dda8-7724-4e45-9ec1-0fd2eec7f607/how_to_program_craftsman_1_2_hp_garage_door_opener_keypad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96f7bed-758f-4024-948e-5608d41104c1/dyson_dc39_animal_canister_vacuum.pdfIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_58f9b4ac635e4e21a364254ab2dab500.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1d4da3-b1a4-4196-86ea-d43701dd633e/darukivawidojuga.pdfIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_2365e1e2c7ad47b09e480a124b8787e7.pdf?index=trueIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_15e5ce0b48664574a6a820986fab6d71.pdf?index=trueIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_4aa08b65a9d849728ef748aaaa5052a7.pdf?index=trueIn PDF document text
    • http://gukutimaguvuzum.onlinewebshop.net/why_is_yamaha_r6_illegal_in_india.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_1dc56a860d034435b694166d919ac54a.pdf?index=trueIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_d156d3b0df7b466ba32573491c4c4fe6.pdf?index=trueIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_c2d37f37faf646aa862df182cde10f9c.pdf?index=trueIn PDF document text
    • http://lafagelupuf.myartsonline.com/49520267536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ec6227-8217-4495-a5d8-e7bc0e15a868/how_to_access_onenote_on_mac.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_dbffd31e5bb54635a51a3d2e029c9ce7.pdf?index=trueIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_33fe26a4a315458992ab90aaf6dfc7d8.pdf?index=trueIn 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_off0000d1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A4 4980 bytes
SHA-256: 6f443efde684276f4bf7950689334d702ae9e7d87f97e6122dd337543b0994ac
font_01_sfnt_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 9644 bytes
SHA-256: c1931f467513c67dabdc615ef072204aed261731d60e5b735a5c316131717776