Malicious PDF — malware analysis report

Static analysis result for SHA-256 65df082081c56d49…

MALICIOUS

PDF

67.2 KB Created: 2020-12-30 15:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9b7f4e770019f0fa7b595d7aa5a14243 SHA-1: ed692f28c62180b085256ebe9bdf5b123414bd6f SHA-256: 65df082081c56d49b261af513909922ef0ac97e3aa6db4480906d37c451dfa8b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The embedded URLs, such as 'https://ggtraff.ru/123?utm_term=brokeback+mountain+putlocker', likely serve as lures to phishing or malware distribution sites. The presence of numerous Weebly-hosted PDF links suggests an attempt to create a link farm for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=brokeback+mountain+putlocker In PDF document text
    • https://lazesomixasima.weebly.com/uploads/1/3/4/5/134588612/puxusu.pdfIn PDF document text
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/fb75f1ae9.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/debupute.pdfIn PDF document text
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/lafifogukowagarobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_5fb291e4f4186.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/0iTjjQd/word_master_approach_for_the_toeic_test.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/mikokegamekozubute.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/jtNdRhg/83572951827.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/felasorarabipis/alice_miller_hayat_yollar.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/50051875805.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/asma_pediatria_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/14955135282.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_off0000bf6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6C 5036 bytes
SHA-256: be250cf4183c0b552bd46b12fa9573655880af5b93d11a34b00dbcfaba94c6c5
font_01_sfnt_off0000d071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD071 9836 bytes
SHA-256: 637d218abb654bdff6a8dde02730fa9f5e06c14bf6d799210cddb6336ac99c16
font_02_sfnt_off0000f211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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