Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca27b11a2f47a86b…

MALICIOUS

PDF

83.1 KB Created: 2021-02-03 02:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 30ac7755a885517e1fa475a4f2084477 SHA-1: 9d6385dea241de6eeea756376faccb4ea37698f7 SHA-256: ca27b11a2f47a86be9e3d244088f6f02d4e76277ca9242af2c50e6d993bb7e2b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://bologen.ru/aws?utm_term=bts+love+yourself+answer+concept+e+version PDF link annotation
    • https://cdn.sqhk.co/vedasukuki/jfhhCjc/gurusuxegatobozofozen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374178/normal_5ff5859c0e71d.pdfIn PDF document text
    • https://cdn.sqhk.co/vigeroti/iip1RNx/wegigiwozijut.pdfIn PDF document text
    • https://cdn.sqhk.co/kusonemap/iyegjgi/hard_boiled_egg_timer_walmart.pdfIn PDF document text
    • https://jikumuwalomaj.weebly.com/uploads/1/3/1/3/131383204/2389513.pdfIn PDF document text
    • http://vijufik.iblogger.org/73626496364.pdfIn PDF document text
    • https://wobofosowipifir.weebly.com/uploads/1/3/0/7/130776138/f5998db2bc90.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/icjjif4/1860872683.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/VFFgOjj/28422557962.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/e5Oiagi/digimon_xros_wars_hunters_capitulo_1_espanol_latino.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444102/normal_600798a0edaf4.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/eGAzVJR/63392970553.pdfIn PDF document text
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/512ed25492.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372707/normal_5fd04ab9de3b0.pdfIn PDF document text
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/9178544.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/roxawo/acirrada_dicionario_informal.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/azar_cracked_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/paychex_401k_beneficiary_designation_form.pdfIn PDF document text
    • http://pijutisiguzog.rf.gd/resignation_letter_sample_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/32247929000.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90E 4284 bytes
SHA-256: 7e5855cb5fd02b661ed3c1f4bf50878b5976a6e080132a219ae4d049b1d44383
font_01_sfnt_off0000e824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE824 5312 bytes
SHA-256: e84759054b63970f0e4a39116f6028a46807695bffeb3f9544d3de5d3c68f2a4
font_02_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 11408 bytes
SHA-256: f4dc6b59610cce10655b26586ce751a42f0dfb7f6fbcd818a8926bb33039fe3e
font_03_sfnt_off0001219e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219E 17460 bytes
SHA-256: ad0c956009451db4ab4bdf843739556c9028ea53baa6f86443d2c9b8c90a7409

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