Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0070918dffa482d…

MALICIOUS

PDF

95.6 KB Created: 2021-05-30 02:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 247881f961e41800ef0e4dec916dff5f SHA-1: 9ecbf350d035a321777ef888591b2a54d1af7f5a SHA-256: f0070918dffa482dcc43f46cab8ebdcce234f0b82223600e95d6d7ccbc512e72
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 significant number of external links, many pointing to disposable domains, suggesting it functions as a link farm or phishing lure. The primary malicious URL identified is https://mezovuduw.ru/strik?utm_term=biuret+protein+assay, which is likely used to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://mezovuduw.ru/strik?utm_term=biuret+protein+assay PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383794/normal_600a08b1044de.pdfIn PDF document text
    • https://lapawiniposa.weebly.com/uploads/1/3/5/3/135323982/05a0a7.pdfIn PDF document text
    • https://rezosegog.weebly.com/uploads/1/3/2/8/132814067/292022.pdfIn PDF document text
    • https://maxedojose.weebly.com/uploads/1/3/1/4/131452800/vibijoz_natobesoxos_katirexamopito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450340/normal_603c22b897ce1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410443/normal_5fc6439974fee.pdfIn PDF document text
    • https://nurowilalivep.weebly.com/uploads/1/3/1/3/131380447/bidowapabuf-lijamiminijewe.pdfIn PDF document text
    • https://wofapebubedidu.weebly.com/uploads/1/3/4/5/134524968/nedebafitejuw.pdfIn PDF document text
    • https://wivirupi.weebly.com/uploads/1/3/4/6/134666213/mitexoripomuxili.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393181/normal_5fcd3ae349e90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_6057df2d82b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_604351cbcae99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478951/normal_6036c10b7e31d.pdfIn PDF document text
    • https://zulezinema.weebly.com/uploads/1/3/0/7/130776370/kinovopomik.pdfIn PDF document text
    • https://supipujijasof.weebly.com/uploads/1/3/0/7/130739476/takedoborufixugubiv.pdfIn PDF document text
    • https://bovagisobupuzod.weebly.com/uploads/1/3/1/0/131070774/sipekuvexirajeboz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_601a9ae1a8c3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b9026660-b457-4f19-a010-4645868eb403/51020791976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb399cc-dade-4373-a488-8db81910ea54/cuisinart_keurig_ss700c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae00bceb-b7b7-4d6a-a033-660473d3057d/how_to_program_overhead_door_model_455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daddf5ac-150b-479a-b350-650f3e7daffc/lonely_screen_free_vs_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0565426e-6adf-41ec-ba69-841cbb0a8795/how_to_always_win_on_soccer_betting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43db76e4-7f8f-4312-b08c-b15da8c61f58/nenutipobejuzobokano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952a0225-a02c-4118-a00a-3ab8738aa584/garmin_forerunner_310xt_backlight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f07feacc-fee9-4845-85df-add2d69e646f/war_movie_free_download_mp4_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76294ae8-0064-4e38-ba32-61216dc49c0a/78769941844.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_off00012b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B47 4816 bytes
SHA-256: 2af1124e5025d21982fb6a46f61ed1b71b6d92c1adaba268ade150330336d3dc
font_01_sfnt_off00013bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB3 11524 bytes
SHA-256: 5f2d198060436a08690260069bf18289d4b1b31c53a04c5291e6c27dbe0c243e
font_02_sfnt_off000162e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162E6 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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