Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad08657b374f47db…

MALICIOUS

PDF

79.8 KB Created: 2021-03-03 20:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fdf915fc54583528f97f727cdd25811e SHA-1: 0eed767d723ad58d5bd1f0c1c6c14d8920434863 SHA-256: ad08657b374f47dbe2ce73eb2066082fb066ae6c8579738ceed372a5eb128b86
166 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document may be part of a multi-stage attack, potentially providing a password to decrypt a malicious archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pelibifir.ru/123?utm_term=como+crear+un+archivo+pdf+con+varias+imagenes PDF link annotation
    • https://cdn.sqhk.co/zajujinul/ggQzjg0/origami_heart_bookmark.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/Vhb9wfO/53953159714.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/Mhhgfif/puppy_wallpaper_hd_new_tab_themes.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/64821920626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370092/normal_5fe39406cc692.pdfIn PDF document text
    • http://flowerport.shop/why_is_writing_important_to_human_geography_and_historyb97y8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_600d6a9161c67.pdfIn PDF document text
    • http://cosmostil.top/voico_uae_review47o7d.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/ijfgjS0/atv_delivery_pizza_boy_2019_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/IHrhiR8/sad_melody_piano_songs_sheet_music.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/what_happens_if_you_break_a_rental_lease_in_alberta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480142/normal_5fdd5b35d5da5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491436/normal_5fe5931294b0a.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/djfgdic/i_am_hero_afk_tactical_teamfight_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/gcrijU1/suvukojewirebozafesiki.pdfIn PDF document text
    • http://legendarycraft.ru/will_star_citizen_be_free_on_releasectt6v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480750/normal_5fe33d0aa9e90.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/surah_mulk_arabic_text_with_urdu_translation638b4.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojonujaj/g9vOHjf/tools_for_wear_os_android_wear_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/h6EHhiM/8174426580.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/0hdu9je/12653448522.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viniwowosur.onlinewebshop.net/zewujazomevevonobilu.pdfIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/5736067350.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_off0000f776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 5504 bytes
SHA-256: efa2b893161aa4e8ea51016b0da8211a8baa076d2a2e9b40842b820e85fbc15a
font_01_sfnt_off00010a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 11708 bytes
SHA-256: a8281622fb03458bc0239ff8d6b263b979aaa4bc920d9b76615a0d91278482bc

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