Malicious PDF — malware analysis report

Static analysis result for SHA-256 07471ffff1c61d92…

MALICIOUS

PDF

76.3 KB Created: 2021-03-27 18:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: edee470aec59da47860c23378bd5faba SHA-1: 3d6fde853737d55dca2fdbc3d079b869df968dc2 SHA-256: 07471ffff1c61d921121c638197ea66a29655bba3c59b45051c97f2cfd395d35
244 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to redirector infrastructure or disposable hosting. The primary link directs to a known malicious redirector, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wix?keyword=landice+l7+cardio+trainer+treadmill+manual In PDF document text
    • https://cdn.sqhk.co/sojetaji/WEhbkSm/jio_keypad_mobile_se_recharge_kaise_kare.pdfIn PDF document text
    • https://welabelodaset.weebly.com/uploads/1/3/5/3/135399274/3697bd60678095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452624/normal_605444eb2ea0b.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/how_much_is_amazon_echo_dot_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/p3eojcR/84755018331.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/how_to_pair_ge_wireless_door_chime_19248.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/acca_f1_mock_exam.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/ieCh7gh/jugabakopibaralewijafeg.pdfIn PDF document text
    • http://tegubija.mypressonline.com/6454371011.pdfIn PDF document text
    • https://rakamirun.weebly.com/uploads/1/3/4/9/134904708/vakedojexuwijar-xigajam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385038/normal_5fe2d9bf54631.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_41b97baa5c9a440b8ae5c9cd73a229eb.pdf?index=trueIn PDF document text
    • https://814bd5e1-0b6f-40f8-b2e9-6ab0015c5eef.filesusr.com/ugd/cc77ff_c4f651c4d66f48a089c10c3bcffd19a6.pdf?index=trueIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_eb6a14f26cad4fa8bbe124436606d5cb.pdf?index=trueIn PDF document text
    • http://kepewitibafef.myartsonline.com/letter_from_birmingham_jail_answers.pdfIn PDF document text
    • http://jupegojut.atwebpages.com/atmosphere_drive_brochure.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_5871b5467e764aa1ba6c589bcc556caa.pdf?index=trueIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_2f0abb498bfc4e6191df344982d137e2.pdf?index=trueIn 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_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 4928 bytes
SHA-256: ac2ec8d9316107add61a07498a97f2944224d52ebc5b379139e6fb0262f610d8
font_01_sfnt_off0000fcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF4 10884 bytes
SHA-256: 94180411d4841343a652971e6261cc5166d0e033cef80b042261270070c951f8

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