Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a0c05c533fcb55…

MALICIOUS

PDF

83.7 KB Created: 2021-04-01 23:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: daf9399c4cd98cf5145e51d9df49b68a SHA-1: 7a4b3c63061a361f54d91f3cfed11262664b9cb2 SHA-256: 98a0c05c533fcb55fdcf7ecbb0750ec548c0e37c330bca0b7f3e924f07d43384
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a common search query, likely to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/aws?utm_term=where+to+put+detergent+in+bosch+front+loader PDF link annotation
    • http://sakepugikunon.mypressonline.com/56224807435.pdfIn PDF document text
    • https://nodikakubal.weebly.com/uploads/1/3/5/9/135966501/dubiloramufi_vatujiwagebe_pakuvuxefad_lulileteriwiv.pdfIn PDF document text
    • https://nijawefevijabit.weebly.com/uploads/1/3/4/6/134665626/4704517.pdfIn PDF document text
    • http://dubiniba.iblogger.org/zomozekigejegiwijebiz.pdfIn PDF document text
    • http://jologedeb.getenjoyment.net/dante_s_inferno_poem.pdfIn PDF document text
    • https://pudefita.weebly.com/uploads/1/3/4/4/134476078/13279a93298c.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/proform_6.0_rt_2.0_hp_motorized_treadmill_reviews.pdfIn PDF document text
    • http://novuzigekisev.iblogger.org/cabal_full_client.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/12864457198.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_ec4beea308944a0e8f23178d599ffb2b.pdf?index=trueIn PDF document text
    • http://muliwavanebebo.onlinewebshop.net/vejosov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18761856-de5b-4620-97e1-32bb9757df62/what_is_ieee_format_for_reference.pdfIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_2d5e891876be47fbb58445dbc1386e9b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77ddef8-6df9-4978-9252-9f9e86fe3294/adobe_premiere_pro_2020_lessons.pdfIn PDF document text
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_dbd3575add224d689fcc00b305c9370c.pdf?index=trueIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_ef92381727d945cb94fe7b58f3d1d042.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5b7fa5-b066-48c1-95d7-76aa8d5dba24/what_is_an_example_of_information_processing_theory.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/81411504937.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_559e3d4c2466483a837d7f90979a3e0c.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_off000109d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D1 5568 bytes
SHA-256: 705031338e6751432e5867d9c774733d9a4b9bc74424cc5dad5ff7cae4d224ae
font_01_sfnt_off00011ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCB 10832 bytes
SHA-256: bf152571966c09271c6a45fe5d5564ebe4732ac6969071783fb4770949a71410