Malicious PDF — malware analysis report

Static analysis result for SHA-256 2064eab9c7416c32…

MALICIOUS

PDF

93.5 KB Created: 2021-02-14 03:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5999dad706649d400e8c145916d07959 SHA-1: 1f02e16500bf3cd9c1e02e850e36379190757a6a SHA-256: 2064eab9c7416c3273fc25a992834d4785e8d6219ea37ebb8c106ee6b81c3c2d
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. This behavior is indicative of a phishing or scam campaign designed to lead users to malicious content. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/123?utm_term=adventure+quest+best+armor+2019 In PDF document text
    • https://cdn.sqhk.co/difigobon/gcgjrlC/field_defender_mod_apk.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/6968774.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/a6c60ecd2a.pdfIn PDF document text
    • https://totakolexab.weebly.com/uploads/1/3/5/3/135391630/dedajopuxo-ruturobi-gaduwigoruvez.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/budoruniwe_rivebubelo_wubepogeweximi.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/igh3Wtd/drinking_wine_big_glass_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/gDChbhh/mivapuv.pdfIn PDF document text
    • https://bupudotededifo.weebly.com/uploads/1/3/5/3/135323991/gimoduj_buvavomajow.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/lanunof-xezotijej.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/jcaXoff/bewisivagajetaba.pdfIn PDF document text
    • https://duvarifa.weebly.com/uploads/1/3/5/3/135347264/7929278.pdfIn PDF document text
    • https://simidolipuxemit.weebly.com/uploads/1/3/4/4/134486986/52d9b13f91.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/a4djcji/giwopijafiruriduxegowogis.pdfIn PDF document text
    • https://pazerutafu.weebly.com/uploads/1/3/5/3/135392620/bedogadadas.pdfIn PDF document text
    • https://gumewutudeg.weebly.com/uploads/1/3/0/8/130813982/puvije.pdfIn PDF document text
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/eca2aa8d.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/tiduro/63510190454.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/huawei_p20_lite_android_9_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/greensleeves_guitar_sheet.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_off00012f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F04 5736 bytes
SHA-256: 1d7be02f895a474e7ad25c54044daf19af3ff07a56aa3c6d122e67846f713c27
font_01_sfnt_off0001426e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426E 11152 bytes
SHA-256: 07a06719ea321146271dd61e52c0cb8a6237e8875b0bec983f6289eba6ec1c80