Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6d3dbe9713c521…

MALICIOUS

PDF

68.5 KB Created: 2021-03-05 21:57:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e9e773d160c91eea9d6fc44f73eb2847 SHA-1: 0eb7e5b3b76ee559babcbdb8c20d1294e1fe4e9d SHA-256: db6d3dbe9713c5217872c60ddaf200cb4875170ec6059b6c74f11b8edcb2a5f7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'resalured.ru', which is suspicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host multiple links on disposable domains, a common tactic for phishing or distributing further malware. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/wix?keyword=ps1+emulator+apkpure PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368497/normal_5fe55cd6a601c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5fdfd67324fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477655/normal_5fd1bfbebfe4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_601359c99e730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476596/normal_5ffce4e954827.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/xavak.pdfIn PDF document text
    • http://takodevizol.iblogger.org/97283182371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413987/normal_6017ae85be8d6.pdfIn PDF document text
    • http://nejurizedutopi.iblogger.org/wefininufoxevemaxolezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465556/normal_5fd3d97ac9b60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501041/normal_5fef65fe12261.pdfIn PDF document text
    • http://benovezim.22web.org/55892487827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27003800-3bbf-4de0-a3e9-1eb0750c8742/33759969828.pdfIn PDF document text
    • http://janorenojitafal.epizy.com/the_go_giver_audiobook_full.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/riddle_questions_and_answers_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a883af46-d712-4b3c-8460-b56437b20e34/11880923708.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/samsung_jitterbug_touch3_senior_smartphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c7248a-8915-4805-9c39-ab3e1f8123e5/what_do_the_masks_symbolize_in_the_masque_of_the_red_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/392e39dd-d319-4c18-ba89-2594b279a417/modernism_vs_traditionalism_in_literature_romanade.pdfIn PDF document text
    • http://tirosonitagaxe.rf.gd/tokezifef.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/all_information_about_neet_pg.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/what_is_the_setting_of_dark_they_were_and_golden_eyed.pdfIn PDF document text
    • http://mirimanomuropa.rf.gd/how_to_do_well_on_sat_math_2.pdfIn 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_off0000d118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD118 5084 bytes
SHA-256: 930fca26234c1e355260550ab0cfe67b3138286a3867bd6d47a0e6d87f1219d7
font_01_sfnt_off0000e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 10128 bytes
SHA-256: 8f49f927b4f6827539207c15085352bb224d3611bd48b131a50aa0a97c05671e

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