Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d77a907acd6e8e…

MALICIOUS

PDF

75.2 KB Created: 2021-02-05 05:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: aa9472406ba7a7b142137c1714c1218e SHA-1: 974dc72ba34b99dc4996653350cda0edeabf2e59 SHA-256: e7d77a907acd6e8e8bc93d573116815ef1cef0a01492dce73c5ffd82c81211bf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection mechanism. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and numerous external URLs indicate an attempt to redirect the user to malicious content or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wb?keyword=ashampoo%20burning%20studio%206%20key%20free PDF link annotation
    • https://cdn.sqhk.co/salifera/TjheXjf/roblox_realistic_shaders_mod.pdfIn PDF document text
    • http://mon-fortuneo.best/the_curated_closet_workbook_free2du8a.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/iajijjT/just_jump_brisbane.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/69793131270at3sm.pdfIn PDF document text
    • https://paboripiniw.weebly.com/uploads/1/3/0/7/130739049/nomanaxerirotewimi.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/4267261.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/fuzaxobes_wabixofim_xatul.pdfIn PDF document text
    • http://damita.fun/90234997975lipx2.pdfIn PDF document text
    • http://detonic-ro.website/text_to_speech_android_9uylhx.pdfIn PDF document text
    • https://vavinaxedekofew.weebly.com/uploads/1/3/0/9/130969509/8642233.pdfIn PDF document text
    • http://onlinekartiadesi.com/mukabawebonekaranewutifiba5vvn.pdfIn PDF document text
    • https://zirotowaze.weebly.com/uploads/1/3/1/0/131070424/putelupanov-kadevilevujazer-zalow.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/iajegji/birthday_cake_images_with_name_editor_for_boyfriend.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/2972280.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/Lidjgd2/prop_hunt_map_codes.pdfIn PDF document text
    • https://gazapaxinu.weebly.com/uploads/1/3/4/4/134475358/rogaso-widosonomifoja.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/subusexulapolu-buguwajigeza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tobito/rudewozosanisevezu.pdfIn PDF document text
    • http://bavipilebevim.epizy.com/gejofa.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/career_path_template_xls.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/71470256554.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AD 5756 bytes
SHA-256: 1e9414122720a553dd4dda4ca28c1f8fcd55d9f246e217164bc87aeaf9f8ecd5
font_01_sfnt_off0000ea1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1E 11488 bytes
SHA-256: 08e5674458e0d5814d3f780007da2e2533b5a7d5b1aa2abade479873937d147a
font_02_sfnt_off00011156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11156 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3