Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aad18f7b8316ff7…

MALICIOUS

PDF

73.8 KB Created: 2021-03-11 14:11:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3c2ad6e2d3f5093e08b6e7131878a2cf SHA-1: 69041c0d67b1d60b885ed8690d031b9413e9997f SHA-256: 0aad18f7b8316ff78e2ea34d0958b26c719499caf0274b9ff948352b3495359d
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, and it contains numerous embedded URLs. Several of these URLs point to known malicious redirectors or are hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document's structure and content indicate it's designed to lure users into clicking these links, likely leading to further malicious activity.

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
  • 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/award?keyword=corpus+linguistics+journal+pdf In PDF document text
    • https://monubigikupo.weebly.com/uploads/1/3/4/4/134493781/fozelemame.pdfIn PDF document text
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/ritusopinik.pdfIn PDF document text
    • http://about-igsupport.com/account_executive_resume_format_in_wordvun13.pdfIn PDF document text
    • http://navaram.online/workforce_thd550_partsxruk3.pdfIn PDF document text
    • http://thehensleys.org/davesamofibazafol7852j.pdfIn PDF document text
    • http://bonboxstudio.com/181295751345upi0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463830/normal_5fe3af5d35092.pdfIn PDF document text
    • https://sedixiru.weebly.com/uploads/1/3/0/7/130740143/doduvifev-ripefawuvir.pdfIn PDF document text
    • http://lessonsonline.site/1489519568exnqp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_6022d7657c4fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466172/normal_6015429b00646.pdfIn PDF document text
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/vuposebika.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_6021cbc75264b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_60410053ace22.pdfIn PDF document text
    • http://venira.su/1592525462t0v5v.pdfIn PDF document text
    • http://beautysale.site/dictionnaire_anglais-_franais_editions_larousse_apkj6ree.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_e938bf149b70427cbfaffa820e4a8418.pdf?index=trueIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_8214124cf3c24961a84e7c510ba9fca9.pdf?index=trueIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_24cf8308181a4b9ba24393808ce0356a.pdf?index=trueIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_dfa3558d7f12445b9a17a799082974ee.pdf?index=trueIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_446494371339478ca278790060bf6e45.pdf?index=trueIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_20fd0036521e4280998b7d313d736b80.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_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 5304 bytes
SHA-256: 5e742085194f66eeaa2312b3ab761d1d60e2f0053989f85d90a4f19f446e5ced
font_01_sfnt_off0000f62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 10604 bytes
SHA-256: c053ec2df0513b0cb3108080acf1bb66fe6c74398a43e74bdb0dc234d56baa21