Malicious PDF — malware analysis report

Static analysis result for SHA-256 5612495719e6f505…

MALICIOUS

PDF

72.3 KB Created: 2021-02-19 06:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5e7c44139d06ad481455323e0d1e6515 SHA-1: 9b5296ee2233e0b77016cc298a4edf4489c4629e SHA-256: 5612495719e6f50562fc614733673bf593dc1c8f59d3d923c1707dcd3e246b0b
196 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://maypoin.ru/strik?utm_term=oshen+smart+watches+price+in+pakistan+whatmobile PDF link annotation
    • https://fadefufogu.weebly.com/uploads/1/3/5/9/135960472/4002712.pdfIn PDF document text
    • https://regutipedazuvi.weebly.com/uploads/1/3/1/0/131071249/1813484.pdfIn PDF document text
    • https://kowijifeno.weebly.com/uploads/1/3/5/3/135390944/5411922.pdfIn PDF document text
    • http://clipshd.design/36_questions_that_lead_to_love_musicalqviij.pdfIn PDF document text
    • http://afracheat8.xyz/4374166112cs9x7.pdfIn PDF document text
    • http://excellent-spb.ru/sheet_metal_bending_machine_wikipediapvk71.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/kubitowowavivefiro.pdfIn PDF document text
    • http://lnstagram-support.live/5942990231ywebv.pdfIn PDF document text
    • https://xafineker.weebly.com/uploads/1/3/4/7/134701786/3296152.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/hgjd3I2/zavojopapetowejigodaruj.pdfIn PDF document text
    • http://magic-world.site/catalogo_de_cuentas_nif_2019aumbk.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/sesijesule/86711486003.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/gajesoriwupebumuxonoto.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/78077808798.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/bendy_and_the_ink_machine_apk_batim.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/tvs_lp44bu_barcode_printer_driver.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_off0000dcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC1 5496 bytes
SHA-256: 9c6b41da5a84995e58cfc3808772082c952139bd42806dafd0e903ec9e867ea2
font_01_sfnt_off0000ef50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF50 10672 bytes
SHA-256: 9b9c40bc1ebe4abe5abbdb0a76fffc66b325f670e64eb9bf411b4ed28fb629fb

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