Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea148fb4bea17e91…

MALICIOUS

PDF

78.1 KB Created: 2021-04-02 01:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9f6c1512b34cdfb51560d9f2fc66e27 SHA-1: 67d44132e2e13f05a9fde971a74996a590593b17 SHA-256: ea148fb4bea17e91ed312e910ab1a5ae9058c47cc6478e77a8bf53b6d778946f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary URL, https://nipisod.ru/wix?keyword=fpse+emulator+android+apk, indicates a potential lure related to software downloads. No scripts were extracted, but the PDF structure and numerous external links strongly suggest its purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/wix?keyword=fpse+emulator+android+apk
    • https://cdn-cms.f-static.net/uploads/4450506/normal_601a0e9cb38d4.pdf
    • https://gilitizek.weebly.com/uploads/1/3/4/1/134131368/28eadc0151.pdf
    • https://cdn-cms.f-static.net/uploads/4409256/normal_604cf3fb7efdd.pdf
    • https://cdn-cms.f-static.net/uploads/4427103/normal_5fe64bfd9985d.pdf
    • https://cdn.sqhk.co/jaxugaveg/gWrigtg/download_truck_io_mod_apk_android.pdf
    • https://nodirodenesubob.weebly.com/uploads/1/3/5/9/135986245/vefazusowa-mamifumosub-tuxuxave.pdf
    • https://cdn.sqhk.co/pisomuwesuk/iIigrht/2016_acc_aha_lipid_guidelines.pdf
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/e77aec08d2f.pdf
    • https://cdn.sqhk.co/bosejadukifo/ggd0vgf/morfologi_ascaris_lumbricoides.pdf
    • https://cdn-cms.f-static.net/uploads/4450727/normal_605a2951218fd.pdf
    • https://jijoromosuw.weebly.com/uploads/1/3/4/7/134714512/wenuma-lolavedik-mirowijaniboxu-ruzaboxeboze.pdf
    • https://zuforupixonop.weebly.com/uploads/1/3/4/3/134394080/tifugadilijeg-xobezigosabu-dimimepigu.pdf
    • https://soseriwu.weebly.com/uploads/1/3/4/8/134898980/3e3c5f0d.pdf
    • https://fikakexuk.weebly.com/uploads/1/3/0/7/130775276/pudefiviro-napope.pdf
    • https://cdn.sqhk.co/lojibuwe/Lggijdp/biwulevixorikenog.pdf
    • https://cdn.sqhk.co/wevemugas/GAPidzk/you_tube_bad_day_at_work_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4380867/normal_6052a2b97eb4a.pdf
    • https://bugituwixumanuz.weebly.com/uploads/1/3/4/7/134722584/zatuwokasow-wotep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kelukakeb/xemenekuvegedudo.pdf
    • https://s3.amazonaws.com/divelatoxa/lenovo_t420_windows_10_sd_card_reader_driver.pdf
    • https://s3.amazonaws.com/fukepez/narabolora.pdf
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_25bae5397e2f478d96f43fc9084bbd75.pdf?index=true
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_0e01d7636c044f6daa03eb659e33fe8d.pdf?index=true
    • https://s3.amazonaws.com/jevedijadiki/best_stocks_for_short_term_trading_philippines.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_off0000f227.bin
6adf2974e5c611447f7d5e7e387f33b5ab7d4414dcc4b1f069220d348f69d7c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 5124 bytes
font_01_sfnt_off00010380.bin
42e1518127a18966a504d2b3ff5e1fdd723f3c86611ba2e0e708e146dbae649e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 12208 bytes

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