Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fc07e366f542eb…

MALICIOUS

PDF

78.1 KB Created: 2021-04-09 06:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 75f341a30f3c03cdfe2cc115bc18222b SHA-1: 80d71a313dd59922e71dd65e0ff97c11e833624a SHA-256: 33fc07e366f542eb48d223a2682dbe5a923ddabbb1452486a50bd43d2b84fc5d
186 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains a large number of external links, with many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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://lozipotod.ru/strik?utm_term=outlander+synopsis+book+5 PDF link annotation
    • http://giwitap.getenjoyment.net/pisuruxat.pdfIn PDF document text
    • https://vororesefuvemux.weebly.com/uploads/1/3/0/8/130813496/sudizezuzijilefuwabu.pdfIn PDF document text
    • https://roxobirunuj.weebly.com/uploads/1/3/4/0/134096027/vemedigita.pdfIn PDF document text
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/bfb172.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/juzikijajiso.pdfIn PDF document text
    • https://leburivirabilaz.weebly.com/uploads/1/3/1/4/131453170/67e400e1c.pdfIn PDF document text
    • http://sarawavenudiwap.mygamesonline.org/29354941127.pdfIn PDF document text
    • https://ridulimozujigo.weebly.com/uploads/1/3/4/1/134109280/fuserumasunibid-toniruxap-duzinopipuzu.pdfIn PDF document text
    • https://morisoxurekes.weebly.com/uploads/1/3/4/4/134464458/3128238.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/regovadeje/ibm_aix_java_7_jdk.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_43e92dae3da8482992f107daae933cad.pdf?index=trueIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/cost_assumptions_are_reasonably_valid_within_the.pdfIn PDF document text
    • http://fazegujopazoj.atwebpages.com/vofave.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_907a468c81ea46fb9a902861cb8346e6.pdf?index=trueIn PDF document text
    • http://fovawipemezipu.myartsonline.com/birbal_stories_in_urdu.pdfIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_0b274166b6e847abafed132beccb33be.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_0bdf9ada675b471394d9fc070d795fb5.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_37eecba789d34d9b80855533be242542.pdf?index=trueIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_2d2d789431994661bb343a19ca2ea03e.pdf?index=trueIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_20d0f3d7d8e94f0099288907519c1989.pdf?index=trueIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_ef9adbb8a09f4f6482c7fa4ced2daf25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusuberu/codingbat_python_answers_string_1.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_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 5412 bytes
SHA-256: b486da3049848e1b752833ddb6bb77dfc41621c690ad2c8ad36b382aba1872fe
font_01_sfnt_off000105e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 11108 bytes
SHA-256: 40178067f0a4268a95047a6e20d68bfd5f0cd9cf9b9534eb1580140e98779550