Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f5787bf07d4b41…

MALICIOUS

PDF

78.0 KB Created: 2021-04-03 05:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03923ff8df27f141336c5953c236d1b6 SHA-1: b016c7d24c4b6a6d94d6c52994653757f4e2c9b6 SHA-256: e4f5787bf07d4b41e0cdd612377a2e4fde48eaf9d71c2aebb9e35a6ed1054a0b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as search results. The primary URL, 'https://fokemale.ru/wix?keyword=onmund+skyrim+mod', suggests a phishing or scam attempt by impersonating a search result for a popular game mod. The presence of ClamAV detection and ML classification further supports its malicious nature, likely as a phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/wix?keyword=onmund+skyrim+mod
    • https://cdn.sqhk.co/mesodimeduje/fhdTjay/kujuzaradezuxuwifepe.pdf
    • http://savadaqwe.space/vuxoxobafoxul4anxd.pdf
    • https://cdn.sqhk.co/gaxomawelej/YggmKhd/windows_10_metro_launcher_pro_apk.pdf
    • https://gowigejovijori.weebly.com/uploads/1/3/0/7/130740297/dodituvum-liguk-zozamilopotari-jopera.pdf
    • https://xovazarorofo.weebly.com/uploads/1/3/4/4/134457653/730853.pdf
    • https://pixirexujana.weebly.com/uploads/1/3/4/5/134527097/vagidajikezi.pdf
    • https://cdn.sqhk.co/dodamewope/icdPvn6/xufamowudazirin.pdf
    • https://cdn.sqhk.co/noxibogalu/TGhgjb9/noselaguxutugam.pdf
    • https://cdn.sqhk.co/tisumusef/giAo3WV/word_on_fire_bible_discount_code.pdf
    • http://medyahanem.com/ladomapalujipubokejabal45wz5.pdf
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/3959538.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_f874e30d0d67458a98955835560571a9.pdf?index=true
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_26af0c79d11b43c39ca335c91d79f635.pdf?index=true
    • http://noluduji.epizy.com/marx_alienated_labor.pdf
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_c6221b3efac64496b904336ec3f27c07.pdf?index=true
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_e32d692825bb42ada4dbe1a111a08f8c.pdf?index=true
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_3cf5bdd9639741d08bd7c53370e9f843.pdf?index=true
    • http://fujuwadutat.epizy.com/artisanal_and_small_scale_mining_in_south_africa.pdf
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_ae0ec85dbf774664932b4723c59dbb1b.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95f.bin
c37110d0da4e105742d10c749942ab12337ea3470bbce166b20ee7c3629292c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE95F 4604 bytes
font_01_sfnt_off0000f8de.bin
a478b84ab9f76d81f3e82a49e12ecb311a9b5df009465850ec2a326c415e0a60
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DE 10492 bytes
font_02_sfnt_off00011c97.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C97 4324 bytes