Malicious PDF — malware analysis report

Static analysis result for SHA-256 e572f1b61b1816c5…

MALICIOUS

PDF

82.9 KB Created: 2021-09-14 15:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 69bc5f0825854043c98784f3fcd2e50c SHA-1: b7448611c1f82d87ac8229235eb7b253c9b344a4 SHA-256: e572f1b61b1816c551f62e1f77381fe9ad98ea9a78136bd0dbff288235aeacaf
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=carrom+pool+super+line+mod+apk PDF link annotation
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/2f0c2d5a06c03f92708583347cd086fb/bazumuminofenajota.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/ferowamasa.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/xufejomolowowexatagonimux.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/18919191772.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/rudukebikixeravalij.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/xobejilatafarutesokiwub.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/aokra43eo9obmgnraqljbmiio5/88104669662.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/nopumufamobuwevixin.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/mexiluwu.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/dasamakakizajezuv.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/febulemakitisuru.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/84945874275.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/xufofadaraxuvotegowegasak.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/popegifijulijagitu.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/19132496547.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/45384643683.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/govezelutalozupunenisik.pdfIn PDF document text
    • https://resicolor.com/upload/files/13566522421.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/vukevuwemajoxa.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/52325813645.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/8528038497.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/39997186806.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/58335839615.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/95748880434.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58909170269.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_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 10680 bytes
SHA-256: 368ebb99fce8cc152ed1723bc275a42de467cda6943c9df600bc7ff59de96ca1
font_01_sfnt_off0000f7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD1 17616 bytes
SHA-256: 52db10e527dfcccc0813504a90f9b847361719156529208ecc2a743c5ef3b9cd