Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fe8db62519422c…

MALICIOUS

PDF

142.3 KB Created: 2021-03-12 11:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 51143f5a39fa7cd1d75e42378dd2fd43 SHA-1: bf06144f2aa99b75ddc5910cc50a49f01fff7aaf SHA-256: 67fe8db62519422c294e1b2b853d45ca6a392568c74e7a2c1eee78f0e6c48526
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to SDGs and Uganda, likely as a lure to attract users searching for such topics. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://seumenha.ru/award?keyword=sdgs+pdf+uganda PDF link annotation
    • https://cdn.sqhk.co/niserutom/jiMjbhi/33217546419.pdfIn PDF document text
    • https://milobixokat.weebly.com/uploads/1/3/2/8/132815045/9775268.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/hiigjao/crowded_house_songs_dont_dream_its_over_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_6047a29e0c5fd.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/Kjj5AvN/15945766435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_60127a1f1793b.pdfIn PDF document text
    • https://cdn.sqhk.co/penuvipaw/Pgd41jg/dissidia_final_fantasy_opera_omnia.pdfIn PDF document text
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/61fea36a7eb.pdfIn PDF document text
    • https://cdn.sqhk.co/terupilenu/Ygchgjd/29074591124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5fdae1289dea9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5fc9403c52f65.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/fhaEiek/plant_and_animal_cells_differences_quizlet.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/936734f45.pdfIn PDF document text
    • https://rutizinudepedo.weebly.com/uploads/1/3/4/4/134483735/2828761.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/cijhgzF/koxikutoj.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/nonurozatava-koxid.pdfIn PDF document text
    • https://cdn.sqhk.co/lefidotoxono/qYijQWl/msr_pocket_rocket_2_deluxe_stove_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/rhfTUrB/tuluvofuxugogifimalavi.pdfIn PDF document text
    • https://cdn.sqhk.co/tusupuwadoda/P2jccNm/pinball_z_windows_xp_cheat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/pedivenofesafegejufoped.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/normal_jvp_waveform.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/dizavujejikotikugewap.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/cambridge_checkpoint_english_workbook_3_answers.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_off0001e7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E7FA 5184 bytes
SHA-256: c1e9ffe170dfa59a1b132699ce2bbcefd9d4aebae4365742d051b561e537ddcf
font_01_sfnt_off0001f9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9B8 15880 bytes
SHA-256: 91560c59bec87844ed316daefa46f299c3757326bb689b1d04777442cec191cf