Malicious PDF — malware analysis report

Static analysis result for SHA-256 97769956d37e5136…

MALICIOUS

PDF

80.0 KB Created: 2021-02-21 01:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 3d0f985887efd0217086c9f1535333cb SHA-1: c15b73949b75b785d5af62e19ac76a8c57b79dd9 SHA-256: 97769956d37e5136f25ff0ce3f2ec9a8db35735cb63f81d7ed180d06c26f4e90
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO spam campaign. It contains a large number of external links, with the primary malicious URL being https://bologen.ru/wix?keyword=andrea+montenegro+romero. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest an attempt to redirect users to potentially harmful content, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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/wix?keyword=andrea+montenegro+romero PDF link annotation
    • https://vabadagijuruka.weebly.com/uploads/1/3/1/8/131856539/finan-luwodukol-maworukadenapo.pdfIn PDF document text
    • http://studytogether.fun/growth_mindset_colouring_pages_printable6lih4.pdfIn PDF document text
    • https://ravixolagawiji.weebly.com/uploads/1/3/4/4/134491843/314245.pdfIn PDF document text
    • http://copyright-help-center.com/sidufewuzimejulupesafeiy1yr.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/5A9yYAP/cat_condo_tree_tower_with_hammock_bed_and.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/vijuz.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/TTiiUgg/hashtags_for_likes_copy_paste.pdfIn PDF document text
    • https://nepokotivo.weebly.com/uploads/1/3/2/8/132814168/gixaxu_takegoresuk.pdfIn PDF document text
    • http://yogist.fun/dexalufujigujisw4vk4.pdfIn PDF document text
    • http://radanews.site/52078535247r9wjb.pdfIn PDF document text
    • http://sewonmedix.ru/mems_accelerometer_sensor_datasheetb0kv3.pdfIn PDF document text
    • https://xolojafiwonizup.weebly.com/uploads/1/3/5/9/135966724/zeromet_difugoga.pdfIn PDF document text
    • http://serdyukov.pro/psychological_facts_freehilmh.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/ifsjcOS/85268464155.pdfIn PDF document text
    • http://choosemadam.site/a_level_english_literature_book1fgro.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/bulolimepol/columbus_blue_jackets_png.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/29177378281.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/arcade_games_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/black_hole_movie_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/wizen.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_off0000ffbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBD 4924 bytes
SHA-256: 0f7063f2c7305b918de459ccde5f80d12e3223d2eb88285fbf5e2bbdd708e423
font_01_sfnt_off00011062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11062 10104 bytes
SHA-256: aeb28cb954a10fb887403778343ccd8607c6e82feb8e991453db9de56cb7fac7

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