Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bbe6e17509b061…

MALICIOUS

PDF

109.8 KB Created: 2021-04-08 22:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6fdae0da31778633371be1dfaaa36cd6 SHA-1: ee4e8e101a997fecffd4d6a604becc5d8a75fdb6 SHA-256: 94bbe6e17509b061e41effa4291fd4acfc85b0329947a3571a6e753489ff4bd0
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains multiple embedded URLs, one of which is flagged as a link farm on disposable hosting. ClamAV detected this file as Pdf.Phishing.Trojan-d2568dad23a94d95. The presence of a download button lure and the ML classifier's high confidence score suggest a malicious intent to redirect the user to a potentially harmful site or initiate a download. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/strik?utm_term=wings+of+fire+dragonslayer PDF link annotation
    • http://bejuzoz.iblogger.org/24455952565.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/neumonia_sintomas.pdfIn PDF document text
    • http://roxopazin.iblogger.org/weather_report_fulda_germany.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/denunopused.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_e0e96a1e84ec46ac8c1c679fdf9e00f0.pdf?index=trueIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_49907c12cb644190be557c53fb42e28c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed1afe7-a67b-4b93-ac71-153501160108/98609326263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32803a31-557b-4adf-bd1d-14700df1bc7d/47868339638.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/43696656926.pdfIn PDF document text
    • http://xokiserigebalid.rf.gd/95815382357.pdfIn PDF document text
    • http://sotilikesad.epizy.com/nier_gestalt_ending_guide.pdfIn PDF document text
    • https://50e0a74f-e7a5-4ac3-a7a6-4cdd7b1ad00e.filesusr.com/ugd/8a9d9f_f659f03fac1b4c8380d3e9de889bb413.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fujadabez/glitter_foam_sheets_crafts.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/68324264906.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/50202964447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819989f9-6df7-47fc-9f1d-f5b9f135a67a/pride_and_prejudice_2005_watch_online_123.pdfIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_ab940e71247647f2981ffe6484e8c912.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05bdc81-e6d1-4431-8c91-ea166c74918f/how_to_replace_ipod_30gb_battery.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_off00017160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17160 5192 bytes
SHA-256: 1ff0926a72c8e39c5584b4d836450403c9f90c90290378eb1c1ad59bf43e0a7b
font_01_sfnt_off0001832f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1832F 11388 bytes
SHA-256: 5f8188e5302989f8ac3f42714e6ba29149c91b743570bc36f53db903385a3023

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