Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d7c0cdaf73c581…

MALICIOUS

PDF

74.5 KB Created: 2021-02-09 04:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a9311dcdbe0707e4709403ac80f8cbd6 SHA-1: 1fc98777a91c3e9cbb5e9cdd83b06c39f7ab1a68 SHA-256: b6d7c0cdaf73c58192679c6cf2a5be0e3b5e98c03fd8a10ae2a4926beed92bb8
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically indicating a phishing and trojan threat. The heuristics identified a brand-impersonation lure for Gmail credentials and a visual download button, directing users to a malicious redirector URL. The embedded URLs suggest an attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/1764513.pdf.
  • 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://seumenha.ru/aws?utm_term=axe+alliance+x+empire+vi%25E1%25BB%2587t+nam+apk PDF link annotation
    • https://cdn.sqhk.co/fopujetoros/iYifqVH/61435339185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416669/normal_6012ea2ad329a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5fdc4cafb3016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473890/normal_5ff9da1822f9b.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/1764513.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/5u4fJgh/alarm_clock_that_plays_amazon_music.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxazigozo/aeBhdxB/sports_3d_games_download_uptodown.pdfIn PDF document text
    • http://zozezobakuk.iblogger.org/zerapixofirasamakupirapu.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/eheuiIK/watatufomatugis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_601540d81e086.pdfIn PDF document text
    • http://bobejitamatu.iblogger.org/allavsoft_video_er_full_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/messenger_apps_2018_apk.pdfIn PDF document text
    • http://tukakuze.epizy.com/fuzik.pdfIn PDF document text
    • http://dudasuz.epizy.com/jogagenaxugenojagogedev.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/bootstrap_single_page_dashboard_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/mopubebajevigo.pdfIn PDF document text
    • http://vonimamodiji.rf.gd/zofilufesizifepabexek.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/skype_for_android_2._2_1.pdfIn PDF document text
    • http://fejukuvazov.rf.gd/genetic_code_chart.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_off0000e309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 5252 bytes
SHA-256: 4171d8f5590e05c3144c17da08fce7db7ad7d237adeb7ff4587e488670047080
font_01_sfnt_off0000f49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 11328 bytes
SHA-256: 50b883a27fa92af7d54fa78c2fb25d9b0b1c88376768f835b3bd5a291b8d1cc1

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