Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14d0b99a47573ef…

MALICIOUS

PDF

78.2 KB Created: 2021-02-19 06:29:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 177bb8544df1958e15c025566829cf27 SHA-1: aef8bc3b83a0ea90e84c352ba391a2e5d66d7c4c SHA-256: a14d0b99a47573efeb04cdfe074b8a6bf7994902c8b425c4f6236acf483f6fb7
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high ML score. The document contains a large number of embedded URLs, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect the user to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://yafferge.ru/aws?utm_term=which+air+conditioner+is+the+best+in+malaysia In PDF document text
    • http://arm-watch3.club/17917225639pb5qu.pdfIn PDF document text
    • http://czecheducation.space/49764642113lilur.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/4f51d4a7.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/3ea83266.pdfIn PDF document text
    • https://jajufuwupu.weebly.com/uploads/1/3/1/1/131163717/suvarobopi_sifakobemozojil_ravaroliwopun_biwoxokalifiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/hcmAgfi/spray_fast_stencil_art_tutorial.pdfIn PDF document text
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/1831547.pdfIn PDF document text
    • https://pazomanu.weebly.com/uploads/1/3/1/0/131069777/447530bf68bf6.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/NAEhhlE/97573276878.pdfIn PDF document text
    • http://shopsupergood.site/85977757794ahrr5.pdfIn PDF document text
    • http://egrn-order.online/95474304845oa37w.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/ratixifo/kelli_tennant_lakers_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/rosewill_challenger_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/android_one_vs_stock_android_quora.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/vozogase.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/free_printable_baby_bunting_template.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/the_canterbury_tales_by_geoffrey_chaucer_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/wedge_platform_shoes_australia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 5224 bytes
SHA-256: c78c3ee90693d6aef5b976103535b5de79cf3c7022a05ec171e0c9f5cfeb7bc9
font_01_sfnt_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 10720 bytes
SHA-256: 4c8ece4f4590183b184f12deeee6743c51119b1bac0baa5d117a64a874de1780
font_02_sfnt_off00011cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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