Malicious PDF — malware analysis report

Static analysis result for SHA-256 9822e48d845ccbea…

MALICIOUS

PDF

79.1 KB Created: 2021-03-09 12:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8719eb4967bb0e008918c451177be2ce SHA-1: db5705202b941287401422bbabfa8c06a199dacc SHA-256: 9822e48d845ccbeac3851e95f74c75d701fdf069c0808ce93de41f276bf27ade
166 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into downloading a password-protected archive, a common tactic for evading gateway security. The presence of numerous external URIs, including one pointing to 'nipisod.ru', further supports the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://nipisod.ru/strik?utm_term=how+to+take+off+fitbit+versa+lite+band PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483103/normal_5fcb1ef78ff0b.pdfIn PDF document text
    • http://jovumelikas.22web.org/is_diablo_2_worth_playing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_6033de95cf2e3.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/Ujigh4N/shadow_of_war_arena_cutscene.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/QhdHJhb/coc_magic_clash_of_clans_hack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384480/normal_5ff4371db51b3.pdfIn PDF document text
    • http://saburogamo.iblogger.org/mufikolusebinidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_602ff5aabd569.pdfIn PDF document text
    • https://cdn.sqhk.co/norejasiwiza/ejhonhc/68436154210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_6044218d143ce.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/femhfhf/skyscraper_movie_building_height.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481990/normal_601e705d48a01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5fceb65f96006.pdfIn PDF document text
    • http://xutuxul.22web.org/captain_underpants_full_movie_download_in_hindi_300mb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://patabajisof.epizy.com/10062138939.pdfIn PDF document text
    • http://wobalewir.epizy.com/what_is_limited_autonomy_mean.pdfIn PDF document text
    • http://zobovobewuw.epizy.com/48743688676.pdfIn PDF document text
    • http://nesitobika.rf.gd/jisigidisutudigunizute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3fa5168-174f-4ca1-8ee8-e724702d17a1/ladelugaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bcbb248-120b-4eea-9515-ae79b54bb5ed/kewasufile.pdfIn PDF document text
    • http://figofubinodafe.rf.gd/90548336623.pdfIn PDF document text
    • http://munakazoxan.epizy.com/32016267367.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_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 5220 bytes
SHA-256: 7f4f3204739fc8fcd27d356dea874f50972837e4595fa46f67326ce6f656a1b3
font_01_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 10520 bytes
SHA-256: 3367712a8f94963c2d6d8433d883fa196750fbe7bd1de657ef57356ba6020eb2

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