Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa2e6932b1dfa7c…

MALICIOUS

PDF

70.9 KB Created: 2021-09-16 14:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a151e0955d9e451546ec55965c10747d SHA-1: d128061bbb670ef632f6c7c5a0dfffd5ccabbe77 SHA-256: daa2e6932b1dfa7cf6f8b483c1b6ea6e4801091f1463d371fdd09d74426f6a01
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external URIs, including one identified as a link farm, suggests an attempt to distribute or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://balie.overeembv-profielen.nl/upload/files/rebutivenajarafaxuva.pdf In PDF document text
    • http://dermalab.pl/userfiles/file/besonudekanejalaj.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/jevosidaf.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/panidosoxinonaguzonig.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/32077245933.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/63049151265.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/kapisir.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/keluwiregejoxupetadut.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/jadobexubug.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/folefe.pdfIn PDF document text
    • https://portofcrotone.com/dati/upload/file/xakozudi.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/39344839001.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/linurawuka.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/felarofabewa.pdfIn PDF document text
    • http://www.immo-uno.com/ckfinder/userfiles/files/47340223686.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/jokupewonuwesolatu.pdfIn PDF document text
    • http://orlickachata.cz/files/files/36815498339.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/15611163568.pdfIn PDF document text
    • http://rnralpha.cz/res/file/nuberalupukewiku.pdfIn PDF document text
    • https://frigosztufi.ro/ckfinder/userfiles/files/79453222516.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/2831173863.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/nisedukenepifowa.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/rixutenijemiw.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/52337726418.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/64693434660.pdfIn PDF document text
    • http://shopabrang.com/images/files/65153808134.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=series+to+summation+notation+calculatorPDF link annotation
    • 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_off0000b3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCC 10564 bytes
SHA-256: 78c0b2e3ae6925dadc8d01be501c07bacb237eef9cf8333ad579a1958701a8a0
font_02_sfnt_off0000e3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E1 16356 bytes
SHA-256: 48d31e3bc006c189816d8792b7f56f77bb9eeb63393058033fbb5bab7dedcb9e