Malicious PDF — malware analysis report

Static analysis result for SHA-256 c946e8528343ac7b…

MALICIOUS

PDF

76.0 KB Created: 2021-06-07 05:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b14f4590ce150a47a91000f48dc70495 SHA-1: 1295f7a73bec8d4b2b1512c82264ee392726cf97 SHA-256: c946e8528343ac7bbcf53e7fac84c14ea44aac229b4255359fe6dcc7860ca771
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9990

Heuristics 5

  • 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.
  • 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://garglob.ru/pbw?utm_term=service+contract+termination+notice+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376101/normal_60265aec66097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_606824a48de28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fc729dc1fdb5.pdfIn PDF document text
    • https://fugesozuxi.weebly.com/uploads/1/3/0/7/130739141/db81bd21c8d7.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/67f438f831be3f2.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/7787654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuvebag.pbworks.com/f/how_to_get_my_w2_from_my_last_job.pdfIn PDF document text
    • http://nafidob.pbworks.com/f/what_is_the_sender_in_communication_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d586404-3d28-40e0-bc1e-6095a213fbfc/1722455284.pdfIn PDF document text
    • http://sojakun.pbworks.com/f/harry_potter_and_the_chamber_of_secrets_j._k._rowling_price.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/w/file/fetch/144751197/affidavit_of_loss_diploma_sample_philippines.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/f/sexekovulememalarare.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/47406610779.pdfIn PDF document text
    • http://nusometa.pbworks.com/w/file/fetch/144741747/how_to_reply_hope_you_have_a_good_weekend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe730f5-492d-4582-b808-f08454c3c364/tegokofi.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/f/maharashtra_state_board_7th_std_books_free_download_in_marathi.pdfIn PDF document text
    • http://jowenoxo.pbworks.com/f/51867268391.pdfIn PDF document text
    • http://dejulagimu.pbworks.com/f/56007422440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439ffdee-98f9-4807-a0e3-3f9e5a309105/nuzigafarunesidesamipo.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144661296/the_hunger_games_mockingjay_-_part_2_full_movie_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e407b5-023a-4137-936e-3144cea3aaaf/28399411049.pdfIn PDF document text
    • http://lavijusana.pbworks.com/f/curso_frances_online_gratis.pdfIn PDF document text
    • http://rorazokazog.pbworks.com/w/file/fetch/144695649/povibiferokagumidafozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9dca916-0592-4dcb-85f5-7618ecc50721/how_does_toyota_production_system_work.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_off0000e9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 5064 bytes
SHA-256: 97b62c66676ceb6b920832120cfef83fd52c00e516aa027aef47ab122a027a1c
font_01_sfnt_off0000faf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF0 10944 bytes
SHA-256: 6a59cafe404ac7b077f7d42df049c3adddce95abdeb5287cbfe3fdc404b96513

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