Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34a9df5b9bc1675…

MALICIOUS

PDF

97.9 KB Created: 2020-12-24 21:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9e75b7b702a0e76567c040af7198911c SHA-1: 9972be2d7c269e46ef84b3a1bdab915208018977 SHA-256: c34a9df5b9bc1675be317437f0b499b30de01075bc45145ee0f1dcd420de2377
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The presence of 'Payment redirection / bank-detail change lure' and 'Callback phishing phone lure' heuristics indicates the document's content is designed to trick users into financial fraud or scams. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 8

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffking.ru/aws?utm_term=beano+comics+free PDF link annotation
    • https://cdn.sqhk.co/jesuzedavoti/ifja0ha/talking_george_the_giraffe_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485172/normal_5fb53b15b30a4.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/vomezix.pdfIn PDF document text
    • https://vizakadaji.weebly.com/uploads/1/3/4/4/134491897/61154f.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/179e84.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/2674649.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478947/normal_5fc612b124119.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/nuzefimilaxat_wokeg_sekurulidij.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/Jhi30ih/sudikosulifixipu.pdfIn PDF document text
    • https://nonaxoboru.weebly.com/uploads/1/3/4/4/134467623/newufodurufubojavub.pdfIn PDF document text
    • https://joxiwawetesamiv.weebly.com/uploads/1/3/4/3/134306419/23591a.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://s3.amazonaws.com/piwupevivotixi/quidditch_through_the_ages_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/kmspico_zip_for_windows_10_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C17 4752 bytes
SHA-256: bd3e134f60069bd773bdc678c76d2ca37bdf6dc16b57f91fe064d77624bf255e
font_01_sfnt_off00012c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C12 12144 bytes
SHA-256: 7f20b98d87fc3226473b1781f9d2b76e05b0b2b366fcbc368d2d0a2f505b23ce
font_02_sfnt_off00015505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15505 16504 bytes
SHA-256: b4f3a4c9a96de026b8fbe8cbaf667d3c1f8fa87355d7468f3234f11039c8c1eb
font_03_sfnt_off00016b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B23 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2