Malicious PDF — malware analysis report

Static analysis result for SHA-256 765326d0907b3a65…

MALICIOUS

PDF

75.1 KB Created: 2021-03-11 09:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73d6fda57cececc670988d5f469d2442 SHA-1: e85749a120e608008b55f74cfc43ef770a88cbe6 SHA-256: 765326d0907b3a65bcb6d696f06d9f0c320c87ea16d5a73a20a84550fa8d5129
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which point to what appears to be a link farm designed to manipulate search engine results or distribute further content. One of the extracted URLs, https://golowaki.ru/wix?keyword=politics+of+the+administrative+process+7th+edition+ebook, suggests a lure related to academic or technical content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=politics+of+the+administrative+process+7th+edition+ebook
    • https://cdn.sqhk.co/betewulo/ieEjcyl/fufomuseduloxabiguzu.pdf
    • https://papafamibupa.weebly.com/uploads/1/3/0/7/130775965/bfba4323f6e1785.pdf
    • https://cdn.sqhk.co/molodomo/5ib5G4Z/sesekevu.pdf
    • https://cdn.sqhk.co/dasekizob/ihbbMja/dulverton_trust_guidelines.pdf
    • https://cdn.sqhk.co/zudilubal/hhhj61Z/while_true_learn_ios_review.pdf
    • https://cdn.sqhk.co/gujowaxexag/ePigiaN/lightroom_app_download_for_windows_10.pdf
    • https://cdn.sqhk.co/latosagax/jbgcJKS/zuzidumebutajuwu.pdf
    • https://cdn.sqhk.co/papusabefo/DAYjjji/flight_tracker_alaska_air_736.pdf
    • https://cdn.sqhk.co/valujoper/gbhhWjb/vilituzale.pdf
    • https://cdn.sqhk.co/nizekidido/ieifZhc/wikigibigabarives.pdf
    • https://cdn.sqhk.co/xejarirep/heibxMj/fiwiwivagezoli.pdf
    • https://cdn.sqhk.co/defalevoruw/bifjj0z/vekuxoromid.pdf
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/dakifinu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bokelur/polytune_2_vs_3_mini.pdf
    • https://s3.amazonaws.com/pajeriramal/36840390482.pdf
    • https://s3.amazonaws.com/kujapomib/velezetakatagevivekafin.pdf
    • https://s3.amazonaws.com/kiwopusafize/python_template_jinja2.pdf
    • https://s3.amazonaws.com/vedexajawo/44226291411.pdf
    • https://s3.amazonaws.com/tobito/xuvijilameponirobigek.pdf
    • https://s3.amazonaws.com/rodigapigeta/how_to_set_a_manual_timer_on_dish_hopper.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87b.bin
2f7a0bb42cf66a958f016871ce8821c4a5eaa913dd411ec3b911ec32bf1c3c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 5740 bytes
font_01_sfnt_off0000fbe1.bin
6b2093726c1f26df91c6457772c5fa0de9f2ac8343f5faa46b8c13b9b82a5620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 10196 bytes

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