Malicious PDF — malware analysis report

Static analysis result for SHA-256 55bc36a35ca1219d…

MALICIOUS

PDF

102.6 KB Created: 2021-03-25 10:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9a0b77ef66327ba95e1592b5ae9578ef SHA-1: 3d40109a6e33bcc0ecb41be9851d52cd64c6622f SHA-256: 55bc36a35ca1219ddb5815c1563d3284f839c7b0530234bc203cdb0b8894e8c8
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an external URI pointing to a suspicious domain, likely intended to host or deliver a malicious payload. The presence of a visual download button heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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/strik?utm_term=cellular+respiration+virtual+lab+answer+key+page+2 PDF link annotation
    • http://sakulog.sportsontheweb.net/supabikixi.pdfIn PDF document text
    • http://xuribof.medianewsonline.com/artificial_intelligence_lecture_notes.pdfIn PDF document text
    • http://okrasote.info/424813149545ixgz.pdfIn PDF document text
    • https://gigatadozewat.weebly.com/uploads/1/3/1/6/131606492/sofaximaduvururun.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/3540333.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/29807387891.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/nec_phone_manual_dt300_change_name.pdfIn PDF document text
    • https://fuxovibafisiboj.weebly.com/uploads/1/3/0/8/130874455/b045dd.pdfIn PDF document text
    • https://jonomivebotuw.weebly.com/uploads/1/3/4/6/134683751/gotimokuji-dujegawunifa.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/f4junhf/79376028322.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/CPHhgAt/watasam.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/66280370022.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/kobevarun-sariliwi-meronesotolo.pdfIn PDF document text
    • http://moneyindia.site/tafebegefadevetem.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/pizivurapab/cafe_racer_mod_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/nejolinifibeji.pdfIn PDF document text
    • http://romepasuv.myartsonline.com/78337547296.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/38979698919.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/25529450891.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001385a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385A 5480 bytes
SHA-256: c7e2d16f86b2817bdd4be2ef1e6bd8c629857f8968cf61aa9c3007a94adf5e31
font_01_sfnt_off00014b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2A 12164 bytes
SHA-256: 91222372d9e9e03d2c2bd3006c3aa45eaaa1f252ab8a9f6c8d3401a097c45f37
font_02_sfnt_off0001747a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1747A 16432 bytes
SHA-256: 497b57ee202ace5b56061992fda45bc6fd5a7aed32249f4138778db1b764c121

Open this report in the interactive analyzer, or submit your own file for analysis.