Malicious PDF — malware analysis report

Static analysis result for SHA-256 4038335905323b91…

MALICIOUS

PDF

74.7 KB Created: 2021-02-20 00:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 629ebe7a40c1961ec1cc20e17941b051 SHA-1: d87855f47e2a1f3f3ce58713dfd58ff5155964d1 SHA-256: 4038335905323b91bbbca6a862ea9296296bbac34906b8df37f94cae50bd2ac1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'bologen.ru', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/strik?utm_term=ingenuity+convertme+swing-2-seat+battery+size PDF link annotation
    • https://zotamitogimida.weebly.com/uploads/1/3/0/7/130775261/novemewokewiw.pdfIn PDF document text
    • https://rozenawaxu.weebly.com/uploads/1/3/4/5/134517597/koriradulokavaf-vuwer-gapozixewovelok.pdfIn PDF document text
    • http://mgacessoria.online/how_to_use_an_amana_washing_machinenjknc.pdfIn PDF document text
    • http://rovejiko.22web.org/48322407633.pdfIn PDF document text
    • https://lekifusa.weebly.com/uploads/1/3/1/3/131382118/tubogujexebe_mokol_gufafuzawu_dejuj.pdfIn PDF document text
    • https://cdn.sqhk.co/jedepazisu/gt3tifQ/ups_drop_off_gonzales_ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_6017aa02c1610.pdfIn PDF document text
    • https://lupabarudu.weebly.com/uploads/1/3/1/3/131398308/2573057.pdfIn PDF document text
    • http://1fps.ru/dawogowulunideloximeft8cl.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/cCutpge/music_video_maker_app_download_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_60263956b5990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_600d6fdd137eb.pdfIn PDF document text
    • http://wegisinebirixe.iblogger.org/96590910048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_601ef89b33e5e.pdfIn PDF document text
    • http://servicesforsupport.com/subawimogisibr9ld7.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/XWniaij/on_my_own_les_miserables_lyrics_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467286/normal_600afb36322dd.pdfIn PDF document text
    • https://cdn.sqhk.co/gulaxemetila/HTibiii/sofexavewagetakonesibapuk.pdfIn PDF document text
    • http://dirtygirl.fun/ikatex_s.a_de_c.v89kbe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://favuzokusom.rf.gd/can_females_wear_nail_polish_in_the_army.pdfIn PDF document text
    • http://lilepav.rf.gd/pusabimevafinutobezi.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_off0000e4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C6 5632 bytes
SHA-256: 050669b763f60a5aa12ded709c96776f65fa21ac6ce49083ccdc354ae25cb2ad
font_01_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 10412 bytes
SHA-256: dad619dae183e92200558b09e9c44a2317735431aff9560a5202d96e6934c6ac

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