Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6cd42273e737c60…

MALICIOUS

PDF

69.9 KB Created: 2021-03-21 06:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 007af1ee8865250911a63f80981dce57 SHA-1: f0ada449c7c90fdd0bf809c01a77a3972f1d78bc SHA-256: b6cd42273e737c60bf7c2f1b2dbf1fc1d18140c09a4969110d30aa5880b1ecca
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/award?keyword=identifikasi+bakteri+enterobacteriaceae+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/award?keyword=identifikasi+bakteri+enterobacteriaceae+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_6024fd6d26c8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366952/normal_5fcc384197fa9.pdfIn PDF document text
    • https://gudagomafefaxer.weebly.com/uploads/1/3/4/5/134523608/gifipile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388835/normal_6007e315eb19c.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/4851837.pdfIn PDF document text
    • https://webupusew.weebly.com/uploads/1/3/5/3/135344455/gozakag-luvuxinizura-xegobikona.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465127/normal_5fef57d8cd254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fd9009d7b563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370762/normal_6001d4323cb9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_6019c8b911db3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_5ffa51a26db3a.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/lubube_wawikugijug_jowiwe_jazonadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5fd64a65557f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://telalodusux.epizy.com/best_witcher_2_mods_2020.pdfIn PDF document text
    • http://wetetepipemo.rf.gd/miracle_thunder_dongle_setup.pdfIn PDF document text
    • http://jetubomubiko.epizy.com/ipl_2020_schedule_players_list_all_team.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/papille_caliciforme_def.pdfIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_675fabd67b48433b88e30a3195e6d6e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/34552960142.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/10_routes_of_drug_administration.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/80480892361.pdfIn PDF document text
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_e1f2cad660cd47968c9331274f1257c2.pdf?index=trueIn 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_off0000d253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD253 5256 bytes
SHA-256: 4fcc81b48293623709411404ac26524f0a635b76072a0f25b7b3136f45d0f5e6
font_01_sfnt_off0000e446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE446 10456 bytes
SHA-256: 2fd1aa3e63bfa471bb0d1c3b7d724bc96784c4a0f730fea49b7f5b0f229abb6e

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