Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6488d8f7814eee2…

MALICIOUS

PDF

83.8 KB Created: 2021-03-20 03:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 780645c178959639e21cb0e46db3db39 SHA-1: 93bb2cdcd250da23c84d683a5d684a50e1ae137a SHA-256: c6488d8f7814eee259efc9933db09c8b3c705c3e49e39d49cd6f391eb30e38b7
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary malicious URLs extracted are 'https://xezojetit.ru/wix?keyword=mx+pro+apkpure' and 'http://copyright-supporthelp.com/wingstop_promo_code_2020_free_deliveryg62j0.pdf'. These links suggest an attempt to direct users to potentially malicious sites, likely for phishing or to download further malware. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=mx+pro+apkpure
    • http://copyright-supporthelp.com/wingstop_promo_code_2020_free_deliveryg62j0.pdf
    • http://bestita.space/watson_theory_of_caring8hwtn.pdf
    • https://cdn.sqhk.co/vekokizijam/VjhjaYP/dream_girlfriend_mod_apk_revdl.pdf
    • https://cdn.sqhk.co/kewudomavave/jb2ShhL/elements_of_design_space_photography.pdf
    • http://betmoy54.com/picsart_mod_version_freelunxg.pdf
    • http://topsale.pro/rixiderusamopogazdq.pdf
    • https://cdn.sqhk.co/letarezetap/CtjdgtM/fast_money_halftime_report_cnbc_fix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/356098f2-cc3f-4af8-a34b-afc152dfc912/types_of_interesting_hobbies.pdf
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_7cc56f86768742d780feaab4dac43e5b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/db985a26-c786-40f5-985d-4d003c610ee3/xinovonozonadap.pdf
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_0a99443d127e46a7b18b40c8cd259d61.pdf?index=true
    • http://pogatipiwidiwo.epizy.com/bokawukunapaliragemuwixer.pdf
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_a865e300945a498aa6a7d49f91b19ce6.pdf?index=true
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_1d43f40672644641b53b7a016f97cf7d.pdf?index=true
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_199d4c44a2df439d9f567ed8da4ff151.pdf?index=true
    • http://zaxutakizet.epizy.com/bosch_dishwasher_silence_plus_44_dba_not_drying.pdf
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_ba1de6f73629455a819c87f9b8c33331.pdf?index=true
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_a2fd5afacc384bbbb98420a880e4c988.pdf?index=true
    • https://uploads.strikinglycdn.com/files/834ad3d5-6073-47f8-81ae-9fe709726058/visio_2013_guide.pdf
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_89747f3c261742a88a0c6670886c8032.pdf?index=true
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_7c071a92a5e64e9abe4c9d52e34d7c34.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7bb.bin
b4ca6a67b92846952c74b41993859a578cffc7022a4d0f956e59d35b7247b056		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BB 7644 bytes
font_01_sfnt_off00010b87.bin
9dc43b1ea4e70a8dbad0639db45acbece8bcd91a5516ef1d16e9dce7b3725ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B87 4740 bytes
font_02_sfnt_off00011bc2.bin
1ffe0c68cac512cef07862501fc74a9f5e191bf17ce2bfe6300ddba2e7784462		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC2 11368 bytes

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