Malicious PDF — malware analysis report

Static analysis result for SHA-256 0588e7f83a73d7e4…

MALICIOUS

PDF

75.5 KB Created: 2021-03-17 00:05:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6750230ffdb1c2bc6a34264038141a05 SHA-1: 6b92f465d5bdf69d65aea241142738d7dac18d7b SHA-256: 0588e7f83a73d7e4ed6048b9cd21cd17bc0a338b939ee2264b1770c4347d28d4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting an attempt to distribute malware or phish for credentials. The document body, though heavily obfuscated, appears to reference a 'Samsung galaxy s2 i9100 manual pdf', indicating a lure to trick users into downloading the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://midufefew.ru/wix?keyword=samsung+galaxy+s2+i9100+manual+pdf PDF link annotation
    • http://nusowutevu.getenjoyment.net/anatomy_of_heart_download.pdfIn PDF document text
    • http://tikovg.xyz/56827277147c27ov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413583/normal_6028099359710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_5fe3e686a75fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447263/normal_603192c2e405d.pdfIn PDF document text
    • http://lesantyqas.online/kumeweluvigifz3rah.pdfIn PDF document text
    • https://cdn.sqhk.co/rojawamusula/VyEighg/ps4_emulator_download_for_android_2019.pdfIn PDF document text
    • http://nosatines.mypressonline.com/weight_watchers_scale_battery.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_6009f7515c6f3.pdfIn PDF document text
    • http://jnatural.space/hunter_douglas_power_blinds_partsxvnqg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446770/normal_5fc575219f02e.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/2hgmVjd/gusazobowiwatudameb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_5fd3b41b4e739.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/tenebukorelusupinubomo.pdfIn PDF document text
    • http://rodina38.ru/72000549800rii09.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/zsBgdSp/outbreak_perfected_destiny_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_601f879cd7d37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_23e9a091e5294550b0c7f1c975613bf3.pdf?index=trueIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_bb7c39a0b37b4130baf1ae0e5815817e.pdf?index=trueIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_2a69e9a642b748c9b0bcfbb327d20564.pdf?index=trueIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_e1673e513425455bb0ba051ce0e024db.pdf?index=trueIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_a0b39d722be640ef9798e19239de81e8.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FC 6020 bytes
SHA-256: 8cba8bca6faaa297ba28f7793f52312a74e526056817eb397399906cb22f3d05
font_01_sfnt_off0000fc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7A 10640 bytes
SHA-256: f3a84f622d623ab26d7b05102c040502d5a15018a6228fce00f5a467d9fd3cfa

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