Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f535032187d4467…

MALICIOUS

PDF

73.9 KB Created: 2021-03-13 22:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e766a072171d6f840ac1584f2c1ac486 SHA-1: 92cf623ff6d3b55e5d4b9a0ce71c7ad564017aa0 SHA-256: 4f535032187d4467b070943cdb537b8aa66e9a4dd528ce5fed3ae447dee4bfb1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://crophysi.ru/123?utm_term=drumheller+alberta+weather+report PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378149/normal_5ff3e37ebb94a.pdfIn PDF document text
    • https://kiradaropamun.weebly.com/uploads/1/3/1/0/131070158/zonewuzax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367299/normal_5ff66c57dbed4.pdfIn PDF document text
    • https://bibevugu.weebly.com/uploads/1/3/1/4/131406802/nixitemusugorolonuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370071/normal_6007b19803077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_600af0143d702.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/jeribu-zipekasem-xezibedelot-tolasur.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/birigopavaloguv.pdfIn PDF document text
    • https://mewixaduzikizom.weebly.com/uploads/1/3/4/5/134594829/wilobusavegumes.pdfIn PDF document text
    • http://boderuj.iblogger.org/2008_honda_cr_v_maintenance_minder_codes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459477/normal_5fe1a8a885579.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/zubuwujoxom/bd_passport_form_word_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/21514191144.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/kezuvekigerenijijuzexu.pdfIn PDF document text
    • http://ramasewo.epizy.com/autosketch_desk_app.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/analisis_del_libro_1_de_la_republica_de_platon.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/82809254852.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/whatsapp_karna_hai_mujhe.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/starcraft_2_legacy_of_the_void_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/how_to_reset_a_hp_officejet_pro_8610.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/mifidafames.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/lake_blackshear_weather_report.pdfIn PDF document text
    • http://dolevegun.epizy.com/71436145791.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11B 5112 bytes
SHA-256: 45ef026c9ee132eb8cc33c75abf44eb97d7a0ead2c638f917fcc9f266d8e150f
font_01_sfnt_off0000f262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 11184 bytes
SHA-256: 6b60348f2dae847451caea17c9cf49a5dad1106534ea6c7476acf90097bc8fe3

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