Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f188c8f71aed69…

MALICIOUS

PDF

96.7 KB Created: 2021-03-13 14:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6fad22db4c26b5bf5e19f36a41f7d85d SHA-1: 30a9095580d14dd1ff7b13190e493f82d67334c0 SHA-256: 87f188c8f71aed6981414ec4eee1980cf9412a73bef920918aa5a0575f015626
186 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 0.9986

Heuristics 6

  • 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.
  • 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://soxebez.ru/123?utm_term=bon+voyage+font+free PDF link annotation
    • http://porizaritofo.mypressonline.com/best_lower_back_stretches.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/45417532360.pdfIn PDF document text
    • https://guzaluvezitalil.weebly.com/uploads/1/3/4/6/134645516/rapegem-lisoxotetubip.pdfIn PDF document text
    • https://kalokawagubur.weebly.com/uploads/1/3/1/3/131398574/zuwodufukepi-jejufexapoxan-migen.pdfIn PDF document text
    • https://gotivewa.weebly.com/uploads/1/3/1/0/131070711/58e431740ab4114.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/beats_by_dre_wireless_solo_pro.pdfIn PDF document text
    • http://pimurenenudipus.22web.org/apprendre_a_programmer_python_3.pdfIn PDF document text
    • https://fanevatonalusi.weebly.com/uploads/1/3/1/6/131637928/dab853a79666.pdfIn PDF document text
    • http://muzomabavima.medianewsonline.com/cesare_lombroso_download.pdfIn PDF document text
    • http://domotoj.sportsontheweb.net/giwefi.pdfIn PDF document text
    • https://kuduxuke.weebly.com/uploads/1/3/5/3/135323303/6058352.pdfIn PDF document text
    • http://tavafotuzefox.sportsontheweb.net/cardiopatia_chagasica_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kulebosux.myartsonline.com/farberware_12_cup_food_processor_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/appvn_pro_apk_english_version.pdfIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_a31293d99eea458584866be056867378.pdf?index=trueIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_3e3c93e71ce940fa8e1591c58c7b6c59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/getizar/mofefukawupoj.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_d34e4ce4a3ec4a2c9a723285a5a6268a.pdf?index=trueIn PDF document text
    • http://dimarujevetuvif.epizy.com/multiplying_fractions_worksheets_with_answers_grade_6.pdfIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_b14fd8379105406fa7b1a5ec87391a7f.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_1c053da97782422a8db1ec51ccacd39a.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE492 4936 bytes
SHA-256: f43c74b78192bc9e93897dc36d9f5eff0518ce92594e530efa1276ee04bd08d1
font_01_sfnt_off0000f551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF551 728 bytes
SHA-256: 7737b218eef3a49aa033eb49ec2938bf1bb7decb481db04080fcf4e8fe3e8ccd
font_02_sfnt_off0000fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 1768 bytes
SHA-256: d87cfef6502af3f798e0ea4c13ea6b57b58bcfd6cea45e538c6487962a867137
font_03_sfnt_off0001043e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043E 44500 bytes
SHA-256: 1861e7b1aa4a39a73d4537147e3feeace714ffa6cd780e71d93b6a8e5b4abec1
font_04_sfnt_off00015d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D1F 16240 bytes
SHA-256: 8cbdc7d9e68ea9e9a848c892d4447e4f2cdb3bf1c6c875bef5c050461c77fc9f

Open this report in the interactive analyzer, or submit your own file for analysis.