Malicious PDF — malware analysis report

Static analysis result for SHA-256 e360db3a6d2bfb3a…

MALICIOUS

PDF

76.1 KB Created: 2021-09-09 11:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 71df0ebeae15528f2675242c7252decc SHA-1: 18fe519b218c43a7d889d495affe671f294f83a2 SHA-256: e360db3a6d2bfb3a7327894a7ae7f5cc89de8488568d1c5f82a0e0f41e7aa90d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are disguised as download links for software, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate effort to create numerous links on disposable hosting, further supporting this malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=picsart+pro+apk+download+2021 PDF link annotation
    • http://zjqzzx.com/uploadfile/file/2021090716382673499.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/wepuv.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/66202830408.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/87461262845.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/puwojovokalowuz.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090614251373499.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/zezom.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/tazija.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/40780482814.pdfIn PDF document text
    • http://ipllaser.in/uploads/98022613484.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/rukazumuvawo.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/12748107137.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/xefuvo.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/d7e61402883e096915fba3f5ae99d96b/34250551368.pdfIn PDF document text
    • https://hotelangela.hu/userfiles/file/99230035581.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/67183600347.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/4705815361.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/mumezefimiforaruxoze.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613057c030653---17203324158.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/75984276783.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/16358176194.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/nuxafexuredizopix.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/lufaxabafezaxuzisas.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/xiputisexetanunora.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/1849240325.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://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_off0000c81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81C 16096 bytes
SHA-256: b3fb808507f6e9973d19afec249b4ba3eb48ffbdee50089f1017adcbcd2175f2
font_01_sfnt_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 10848 bytes
SHA-256: 8db24e1907ab97ef53b8a1868ec8983b4b009f43a383eabb7d6c8401b82a6b58
font_02_sfnt_off00010a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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