Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea7b62bfd78b71d…

MALICIOUS

PDF

79.0 KB Created: 2021-03-30 16:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c581f54725ea6da1b33033b63efb3f9 SHA-1: eaaf40cac6b57255340a6266b66fa9b30a3b0abb SHA-256: 9ea7b62bfd78b71d381b8cd8bab874f3c80ead0b3bf8ad79fee75044e3b0e79e
196 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings for unrelated content, a common tactic for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to connecting a device to Wi-Fi, suggesting a phishing or social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/aws?utm_term=how+do+i+connect+my+iaqualink+to+wifi
    • http://missunik.space/infographic_poster_design_templatexuaf0.pdf
    • http://milanomoda-italy.site/what_does_differential_pressure_sensor_do2jedh.pdf
    • http://begdas.fun/sodinumabosekakokagebgprjx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_6d8f05288530459b959b8de34092c8fa.pdf?index=true
    • https://4f0f5a39-0a2f-4cdf-b4e4-40a644fad8b9.filesusr.com/ugd/2024fe_81a7fa7700ce459586a3b86450ef0923.pdf?index=true
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_7ac7f29aa0d14db49b2d64100aa99646.pdf?index=true
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_ea1001f1a32f4e1caa99337b8180779a.pdf?index=true
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_1e6bba6398d244d798dbf867d4222f96.pdf?index=true
    • http://vunolipatebaw.rf.gd/residential_rental_agreement_florida_template.pdf
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_1fe5298d68cb4f85b8705b3060cc5042.pdf?index=true
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_27fa51d2ba2a49fb8756f19aca83a0f8.pdf?index=true
    • https://79c9c32e-6572-42fd-9c0e-61d057d48a34.filesusr.com/ugd/33a1c8_4ca28ff1ac584906ad91c9dac5df285f.pdf?index=true
    • https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_aa464326369e48a8b1c9405630db71eb.pdf?index=true
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_74f3ed90225f4d3aa62605cd94a4a9d9.pdf?index=true
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_d0bacdfa46964452ab164a1dd4c86883.pdf?index=true
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_8eb5fb22cce946f181a10ec040890925.pdf?index=true
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_468229f1ef9c4e0e800621343ce84448.pdf?index=true
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_7485e6410dd34811854999d7ff39b0d9.pdf?index=true
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_c8cf2a3fb105481cb1247674a93ff422.pdf?index=true
    • http://wedizakur.epizy.com/what_are_the_3_main_tools_of_monetary_policy.pdf
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_1c5ee4b2e69040e6be866c89b22b87a8.pdf?index=true
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_bb253cfa7b4e4d52bb20a8d81c9e25d4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c3.bin
78eff7c803e76ea4f90109b6495879f5f59660ce2601e7f4edf514da89e9cfc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 5240 bytes
font_01_sfnt_off0001089c.bin
8a74d3e1351636696b49930b5dac9ff5b4248c3a26d9199e010128af57a36be7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089C 11052 bytes

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