Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b87e6e653fbe000…

MALICIOUS

PDF

81.1 KB Created: 2021-04-10 05:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11c782aab93af2745fd3e952e77cdcbc SHA-1: 3653c2f10523b201b0a2d023c15cf541dbea644a SHA-256: 9b87e6e653fbe0009525a74a608778b50d1694b46c7202e430ced87bad7b8203
164 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 phishing or trojan threat. It contains numerous external links, with one specifically pointing to a URL that appears to be part of a phishing lure related to a 'customer visit report format excel'. The presence of a download button heuristic further supports the malicious intent of tricking the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=customer+visit+report+format+excel
    • https://fibigator.weebly.com/uploads/1/3/4/3/134313363/1545618.pdf
    • https://tijoteveduno.weebly.com/uploads/1/3/4/8/134853829/xudokikixokilewo.pdf
    • https://taralibupub.weebly.com/uploads/1/3/4/3/134372711/dufinazut-fifobosizegene-galenalufuzir-zikifepuvap.pdf
    • http://gadivawiw.sportsontheweb.net/la_ciudad_latinoamericana_alan_gilbert.pdf
    • http://sozaxesugoj.mywebcommunity.org/borelu.pdf
    • http://xevusezes.medianewsonline.com/rajijoxiwajozameroxep.pdf
    • https://zanewodibamejat.weebly.com/uploads/1/3/0/9/130969445/8728977.pdf
    • http://fabujisaw.mygamesonline.org/9160683311.pdf
    • https://cdn.sqhk.co/ketegobuto/cjcesC0/84368401818.pdf
    • https://zusavakaki.weebly.com/uploads/1/3/0/8/130815140/8f289.pdf
    • https://ruxapumuful.weebly.com/uploads/1/3/4/6/134682584/faf760.pdf
    • https://linikakisevokeg.weebly.com/uploads/1/3/6/0/136098208/nijazot-zeroz.pdf
    • https://joposiga.weebly.com/uploads/1/3/5/3/135399072/2927803.pdf
    • https://pumejikugo.weebly.com/uploads/1/3/0/9/130969330/pujanarezidik.pdf
    • http://datiwufirul.medianewsonline.com/nirumajudegira.pdf
    • https://cdn.sqhk.co/guvawatuzax/ig4PFii/parachute_engine_retro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gelawiweza/lipirasisuzanomuz.pdf
    • https://s3.amazonaws.com/nilititonawafim/blue_eyes_1080p_video_song_free.pdf
    • https://s3.amazonaws.com/fasudikek/curious_cat_pro_apk.pdf
    • https://s3.amazonaws.com/firudegix/android_one_ui_dark_theme.pdf
    • https://s3.amazonaws.com/kujesulad/cara_cheat_tamat_gta_sa_di_android.pdf
    • https://s3.amazonaws.com/sorapobuk/chinese_grammar_wiki_book_elementary_download.pdf
    • https://s3.amazonaws.com/xukirizugukugi/tafseer_of_quran_in_english_audio.pdf
    • https://s3.amazonaws.com/zolerazowubow/list_of_foreign_words_in_english.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/gejogigixitowojoza.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_off00010101.bin
3b597876b5bf3493b325cd196745d6f40f5d9e16cdbcc37044c3e523b45c37da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10101 5192 bytes
font_01_sfnt_off0001129b.bin
8fce558e824882792ace574f9ce0181fe2676e04474cc96e97a48d1f8a6623aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 10548 bytes

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