Malicious PDF — malware analysis report

Static analysis result for SHA-256 316a680925bcced8…

MALICIOUS

PDF

78.8 KB Created: 2021-06-12 16:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ee3fdaba1cb5c5e99f4f2db1b9a94987 SHA-1: cde254d167cc38d500ced0572cf0a1f863671e69 SHA-256: 316a680925bcced8257713ac2dc3ee512bc3cdbde8f22fe24d1eef13d2a90444
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The presence of a booking.com related query in one URL indicates a potential phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://botokaw.ru/123?utm_term=booking.+com+contact+information+australia PDF link annotation
    • https://jofuzidud.weebly.com/uploads/1/3/4/8/134868871/mufizijijowadefo.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/6659197.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/f8ab1526b692.pdfIn PDF document text
    • https://rosafuzumago.weebly.com/uploads/1/3/1/8/131857847/xovixow.pdfIn PDF document text
    • https://janodiwuzujemux.weebly.com/uploads/1/3/1/3/131382133/1283177.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/9ca6bccf-8257-48ac-8b00-2ff6b1459690/50603265936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d5dadc-3dc0-468c-a2a5-feec25312f59/xefimaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3830db0b-7768-490e-ba80-04404fad3722/what_foods_have_complex_carbohydrates_in_them.pdfIn PDF document text
    • http://wikoborumun.pbworks.com/f/aaron_kell_oceans.pdfIn PDF document text
    • http://movapog.pbworks.com/f/northeast_mississippi_community_college_corinth_ms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6aabee5-15a8-4c68-8c06-d9f3011e53e9/how_to_draw_pencil_sketches_of_faces_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63cd873-64b3-4a9e-a13e-6d3074a59af6/the_little_prince_movie_download_in_hindi.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/145186470/in_fig_6.33_pq_and_rs.pdfIn PDF document text
    • http://popuwepux.pbworks.com/f/leresigulik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded2fc0d-97ee-43da-a0c4-7ba88632bc78/meridian_phone_system_voicemail_setup.pdfIn PDF document text
    • http://samunoge.pbworks.com/f/out_of_my_mind_free_online_book.pdfIn PDF document text
    • http://kuwulete.pbworks.com/w/file/fetch/145182384/xetibijamodemuwome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d3de22-e3ce-4a37-a2fd-31e6fa493ed6/how_to_set_westinghouse_timer_model_28426.pdfIn PDF document text
    • http://difaxalin.pbworks.com/f/murder_mystery_2_trade_values.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/f/programacin_lineal_entera_binaria_ejercicios_resueltos.pdfIn PDF document text
    • http://zipiwume.pbworks.com/w/file/fetch/144608685/zanukomanorobawegofabobut.pdfIn PDF document text
    • http://gutogupaxaz.pbworks.com/w/file/fetch/144820845/74608139041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bdc3dd7-98b9-4ef5-afff-0055226e9491/what_is_the_difference_between_genjutsu_and_ninjutsu.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_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 5348 bytes
SHA-256: 4390926216c910dcf87e67d3efe3345602eb457a55a14afc8ecf159a47afea9c
font_01_sfnt_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 11112 bytes
SHA-256: 6019fbe86c4f4183f98cfe01ad407fc07583479fca7817fd2298bd886e06ed09