Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40b5d901f2b2869…

MALICIOUS

PDF

82.8 KB Created: 2021-03-07 07:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5793ce14428760c925ff3afad2229056 SHA-1: 7ead16e8a751ae9df597b22c7ad998e8816b66d8 SHA-256: e40b5d901f2b28699dc0af16f6248dc0f6a8c9bc475ff2aca4cc316f236182ad
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, suggesting a link farm or redirection mechanism to host malicious content. The document body, though heavily obfuscated, contains text related to downloading an Android application, aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=download+and+install+showbox+for+android+apk
    • http://gobotujadix.22web.org/symmetry_worksheets_grade_3.pdf
    • http://fafizaso.iblogger.org/durga_saptashati_in_telugu_free.pdf
    • https://cdn.sqhk.co/fopikudapom/SOmgcgf/bitmoji_classroom_ideas_1st_grade.pdf
    • https://cdn-cms.f-static.net/uploads/4407983/normal_600b28de60238.pdf
    • https://jafoxoxuxovawe.weebly.com/uploads/1/3/0/8/130813536/24482a6763f3d6.pdf
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/xenefif-zuwawisimusege-sakevewibobeli-jepisaduv.pdf
    • https://cdn-cms.f-static.net/uploads/4470226/normal_602974908eed7.pdf
    • https://cdn.sqhk.co/wepunajexiju/geYjbWA/51793891747.pdf
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fec79e2335ed.pdf
    • https://cdn-cms.f-static.net/uploads/4409118/normal_601ebda7e946a.pdf
    • https://vuvuzuvikedatun.weebly.com/uploads/1/3/4/5/134529562/7627335.pdf
    • https://vanixegufewip.weebly.com/uploads/1/3/4/5/134511125/fonugog.pdf
    • https://xinomufe.weebly.com/uploads/1/3/4/7/134706409/mufagujavu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zaponabugati.epizy.com/ebook_reader_for_pc_and_android.pdf
    • http://zaxukesaludu.epizy.com/08_avenger_battery_location.pdf
    • http://wiwekire.epizy.com/way_back_home_shaun_song.pdf
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_315b0fe1f79b400c98a46d11b78a0a6e.pdf?index=true
    • http://xitiwefebulu.rf.gd/9162297362.pdf
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_c4862fbe68cb411690822bf5640259cf.pdf?index=true
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_db56934f5320451e8c10ac16007738ee.pdf?index=true
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_8f11c206f5ed4ae79557b15547155247.pdf?index=true
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_6b6f0eaac82f4578a208a0a0493f0152.pdf?index=true
    • http://fozijasorizol.epizy.com/perakiraw.pdf
    • http://medozazi.epizy.com/habanera_from_carmen_violin_sheet_music.pdf
    • 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_off00010829.bin
c00b878fb7201fb6f294fda352cf1fef55de617db07770d70560cafe003d6304		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 5492 bytes
font_01_sfnt_off00011ae9.bin
19dee9a6a77a78a6944f4089d6ec2a4f9276cf61f384eb1fe89d2f9137acd031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE9 10028 bytes

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