Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1945327c94ea94f…

MALICIOUS

PDF

93.0 KB Created: 2021-02-22 16:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b0470169d3da498bdd81b8969b796462 SHA-1: 5962be37b5a5300d3064dbca329e4ccce759d4d2 SHA-256: c1945327c94ea94f405cdfef72d0cf2fa4a42bad5b4b7719e7c5fa7f6d19f28c
226 Risk Score

Malware Insights

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

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external links and the nature of the scam lure point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jottigo.ru/wb?keyword=how%20to%20thank%20mom%20for%20everything PDF link annotation
    • https://cdn.sqhk.co/kelopifagisu/I0hdbjc/planet_pizza_minot_hours.pdfIn PDF document text
    • https://wabirigiraziw.weebly.com/uploads/1/3/6/0/136017191/51ff16eac.pdfIn PDF document text
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/ec071c.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/hhfLyge/vevojasebomazaro.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/miiaifI/93837733343.pdfIn PDF document text
    • https://bejizasidofivi.weebly.com/uploads/1/3/4/2/134234705/e04665d.pdfIn PDF document text
    • https://givebuzuwipagin.weebly.com/uploads/1/3/0/7/130775776/xaledulerilitamube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_602aac0feca52.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/1181111.pdfIn PDF document text
    • https://gigumozogewa.weebly.com/uploads/1/3/4/5/134597084/ff380752c9ab31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373509/normal_5fe0b5fcdc8db.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/dSFnqhj/57444516320.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/AYicghh/cheats_for_gta_5_ps3_online_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_6019a4cec06a9.pdfIn PDF document text
    • https://pobivizitonep.weebly.com/uploads/1/3/2/8/132815986/3550644.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 5040 bytes
SHA-256: 19acff81fa6693ba31efe6fccbaee1d17727783be536fd6887391d1d66fb9087
font_01_sfnt_off00011056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11056 2528 bytes
SHA-256: c6252b4d8d750144d767bf15398de2e5b59ad7453580c69ac8a4daf0d2525ed8
font_02_sfnt_off00011b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B87 11556 bytes
SHA-256: 833cb36c382b5e4f0514c13311e9648f785341f20fe7926411b72536800cb4a0
font_03_sfnt_off000142eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142EB 16168 bytes
SHA-256: dcc437beaabc532c244cb2402c7e187dabb6fccd34af89cd9e2270a2a4498d3d
font_04_sfnt_off000157f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F2 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230