Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca339a4fac621e10…

MALICIOUS

PDF

79.9 KB Created: 2021-06-07 22:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1384f6057450357ee905d8cdbac6f2ad SHA-1: c2549770bc753fc5d19e5e496c9bef914dcf1016 SHA-256: ca339a4fac621e10062bdf9bbdb711971e0cfa8b99c9f9c00d08c2ef86a33c91
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to religious lyrics, which is likely a lure to disguise the malicious intent. The presence of numerous external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://smidgel.ru/pbw?utm_term=gloire+et+louange+%25C3%25A0+toi+seigneur+j%25C3%25A9sus+paroles PDF link annotation
    • https://zegadakupoxak.weebly.com/uploads/1/3/4/7/134749069/919cc.pdfIn PDF document text
    • https://sagekafota.weebly.com/uploads/1/3/4/3/134351395/nevakesegogugazaroz.pdfIn PDF document text
    • https://wubepina.weebly.com/uploads/1/3/4/7/134721378/pobunaz.pdfIn PDF document text
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/e3b29b44a.pdfIn PDF document text
    • https://sunupukub.weebly.com/uploads/1/3/5/3/135319403/xiwipifesudimiw_vunusoge_zozare_felizobugab.pdfIn PDF document text
    • https://rawitexebava.weebly.com/uploads/1/3/4/4/134487877/55fb6.pdfIn PDF document text
    • https://vojufeluwa.weebly.com/uploads/1/3/2/6/132681665/0a78d648.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/jekalomava.pdfIn PDF document text
    • https://donasidavojixa.weebly.com/uploads/1/3/4/4/134494786/2600893.pdfIn PDF document text
    • https://vuguzunorofina.weebly.com/uploads/1/3/4/3/134322364/3069629.pdfIn PDF document text
    • https://lulotabo.weebly.com/uploads/1/3/4/7/134745182/e4fc292c.pdfIn PDF document text
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/1460007.pdfIn PDF document text
    • https://bikekifo.weebly.com/uploads/1/3/5/3/135304891/54f0b0917a3.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/12f5e89d-be0b-4381-bf78-dbceb3d0c089/2067749974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1245d6-9d32-4a9c-9201-d1070c65c2e2/head_first_pmp_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edce8d52-1d43-43d9-b380-a2a2d024db63/joginujaxejesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/940f06a4-1225-4ffc-a0f7-785f4d483ab8/does_gorilla_mind_rush_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5de4d9f-094e-407a-b5f4-323c81b30b23/large_print_dot_to_dot_printables_for_adults_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db373b14-80c4-4760-9340-56b08b51adc4/personajes_principales_de_el_libro_100_aos_de_soledad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ebff3f6-75e7-410b-8ac9-0be83fa4ae78/76183052603.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_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 1636 bytes
SHA-256: 1f7a6ba9cb008f5060ed0601d1147561102378325024564ec5902e7680e93d46
font_01_sfnt_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 5468 bytes
SHA-256: 3e4ef8ca83aa186446f907c234510eb578ca553559c030b548b42c1d69a8b2aa
font_02_sfnt_off00010822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 12584 bytes
SHA-256: a641f3d0901b221c479b5d8837c9cc217981dbe3809ad31c58b1307042f2291a