Malicious PDF — malware analysis report

Static analysis result for SHA-256 666fab0b2f47deac…

MALICIOUS

PDF

78.8 KB Created: 2021-03-13 21:52:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a770ed2ecf391edab2c6dd7632c56aec SHA-1: 633d396b66604334ecb9f8d6206fa850fee91dd8 SHA-256: 666fab0b2f47deac4a449537a1aca5c94c9331ae742d3c31b8748deb7eddbcd5
156 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 phishing or trojan-like behavior. The document contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious intent, likely related to distributing further malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=2004+volvo+xc90+maintenance+costs
    • https://cdn-cms.f-static.net/uploads/4420764/normal_602fd2975e943.pdf
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5fd7d583405c5.pdf
    • https://static.s123-cdn-static.com/uploads/4403118/normal_5feb96c067993.pdf
    • https://cdn.sqhk.co/lupobikud/hdmxrrI/communist_symbol_png.pdf
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5fd28b8c3d49d.pdf
    • https://cdn-cms.f-static.net/uploads/4485163/normal_601d4b7281fb3.pdf
    • https://static.s123-cdn-static.com/uploads/4418185/normal_5fcb8fbaea756.pdf
    • http://filopibat.22web.org/zawebes.pdf
    • https://cdn-cms.f-static.net/uploads/4477623/normal_5fd2ab6a8d9ad.pdf
    • https://cdn.sqhk.co/romilononove/fjj4jed/jiffy_lube_coupons_maricopa_az.pdf
    • https://cdn.sqhk.co/goxobuve/iejb6ih/89458830114.pdf
    • https://cdn.sqhk.co/teruzemoru/ieFrig9/genki_sushi_catering_menu.pdf
    • http://fotobaruti.22web.org/fl_studio_free_loops_pack_download.pdf
    • https://cdn.sqhk.co/wusosekame/XMjckcO/la_mia_ultima_storia_aiello.pdf
    • https://cdn-cms.f-static.net/uploads/4451368/normal_6038192296f0f.pdf
    • https://cdn-cms.f-static.net/uploads/4376854/normal_602be53cd2fff.pdf
    • https://cdn-cms.f-static.net/uploads/4402710/normal_6033bfe2dabb5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_6ea56b9e88d640dda80637cfaa617e03.pdf?index=true
    • http://widevuwototavu.rf.gd/jipukunobisonip.pdf
    • https://s3.amazonaws.com/gotenukevepunin/verizon_fios_business_customer_service_phone_number.pdf
    • https://s3.amazonaws.com/gumagabu/telugu_new_christian_songs_naa_songs.pdf
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_4ff9a195681c4fb7ad8925d08f0f864d.pdf?index=true
    • https://s3.amazonaws.com/forupokisip/7352990309.pdf
    • http://dafifaxotodaraw.epizy.com/alphabet_practice_sheets_for_nursery.pdf
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_02c3c8000f1e4354a13031c4f087b9e5.pdf?index=true
    • http://fafalibowadavuz.rf.gd/abbyy_finereader_editor.pdf
    • https://s3.amazonaws.com/regufojalojaza/adobe_acrobat_standard_2017_version.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f50f.bin
057cceed46ecb590a22c11a242555d513df21a93a0303aa92f3de21661da06eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 5400 bytes
font_01_sfnt_off00010766.bin
33486dd15ed47506e045d19ace5b1b35da45ea76ef0130553abdd64b459f122f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 10712 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.