Malicious PDF — malware analysis report

Static analysis result for SHA-256 22588163e30406f4…

MALICIOUS

PDF

82.2 KB Created: 2021-03-20 01:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5fc7fffc76c3c6708284b6b3961d6af4 SHA-1: 253f9a33f42568e16d9533c20261e8d69972f4d4 SHA-256: 22588163e30406f4a9072278f91bae8174724bc42b4ac8528f5241c5fcf5b907
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=hunter+leveling+guide+ragnarok+renewal PDF link annotation
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/5449096.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/fegaxorujep-nefogize-rexebemoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/chdLCP8/38309848723.pdfIn PDF document text
    • https://cdn.sqhk.co/duwefetufe/D6yGhbT/chinese_zodiac_2012_movie.pdfIn PDF document text
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/9438676.pdfIn PDF document text
    • https://wesuzekubiw.weebly.com/uploads/1/3/1/6/131607103/bejepibobasuk-pagugubajipivan-gojaju-muvimomina.pdfIn PDF document text
    • https://cdn.sqhk.co/dojarodawiw/geLKlih/forza_horizon_3_mobile_app_download.pdfIn PDF document text
    • https://nuguserofaj.weebly.com/uploads/1/3/0/9/130969707/zejoxegorolo.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/falinitopigati.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/aihhcic/weeds_cast_season_7_episode_3.pdfIn PDF document text
    • https://bibawegosisuzu.weebly.com/uploads/1/3/5/9/135961680/6187612.pdfIn PDF document text
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/6079608.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/dfa198db-eba5-4219-8968-1842e114a59e/solution_set_of_following_linear_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8163ccb-bede-45d6-abc3-92f83c346232/nubumobekizatalitosedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c779285-305d-4e92-8d61-13b1ffed4616/velezokokofiwanonovov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f535b19-e58a-40d5-a6fa-8d771cab8c81/tipos_de_sistemas_de_informacin_administrativa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d20674c-56a9-4a77-a42f-b4b81aa090ab/turudekewan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46f66cc-7c0f-4241-9860-52ab9d700f7f/benusodazodurukuzipimosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ef1519-58ce-4423-9010-e59f42035ace/how_is_grit_measured.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/198e21fe-4b4b-4aa2-a0bc-cf62de475134/what_is_tcp_ip_network_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f8d4c0-0f62-448d-aff3-0af5b953dafc/what_is_the_radical_revolution.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_off000103a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A4 4992 bytes
SHA-256: afd395e8f9c5d476b2aaab5e0caacfab5fed19e161591fbb18949cf2b061f11c
font_01_sfnt_off000114c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C4 11452 bytes
SHA-256: 498beca420172b4f85e0969fdd17d90d6bc2944823cad648da8315478196c80f