Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd36524a28d1c30…

MALICIOUS

PDF

88.3 KB Created: 2021-02-18 03:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0a6ef6222c6c5cdf3bc6c8c550bd74a8 SHA-1: 4b6bff5e16ef89aca21afbbfb15404aede560a69 SHA-256: 7bd36524a28d1c30d24910e8f55d48be506573aa2b6e6104292d552126aecb27
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=native+american+zodiac+bear+meaning PDF link annotation
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/jupogofibatanur_netumufowutuk_fezubefujalijup.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/7212537.pdfIn PDF document text
    • https://ninijaliwejito.weebly.com/uploads/1/3/4/3/134350726/pupoworujoma.pdfIn PDF document text
    • http://ripelavezomosiv.iblogger.org/nisumaretazorumeve.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/wotodedaruzuk/dimubapipunoxaxowe.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/kp_astrology_software_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/australian_ballot_paper_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/relutu.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/65343761339.pdfIn PDF document text
    • http://bukogog.epizy.com/38468035231.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/airline_manager_2_tycoon_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/xakowiduduribaxeraku.pdfIn PDF document text
    • http://vatasinunevuto.epizy.com/4560047898.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/jeep_cherokee_kj_buyers_guide.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/slope-_intercept_form_math_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/network_security_private_communication_in_a_public_world_solution_manual.pdfIn PDF document text
    • http://meganabinas.rf.gd/gawujumedeguvuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EE 5268 bytes
SHA-256: 06f008ed7d329f897d50a3fb7591a9d266e5b57424d81616321625937c068047
font_01_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 10380 bytes
SHA-256: ce3914b692d1c1b687d261a7006967aa7356ca34e0bc70c880c4817d843ee18f
font_02_sfnt_off00013775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13775 18340 bytes
SHA-256: 629974a14a3d63ead815c10022021ae95a3a4ab200dfbc9d1086cf799b5d143d

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