Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d1cc37de1ede3a…

MALICIOUS

PDF

83.4 KB Created: 2021-09-17 03:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ec88a2c20972750819b3390a78018336 SHA-1: 2ea96966e208a56ccb3c25b6a209fb2c7f901111 SHA-256: e9d1cc37de1ede3adbac600e331c340f40edb1b0933c85d79b9a00de7da32ada
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one that appears to be a link farm, suggests the PDF is designed to redirect users to malicious sites. The 'SE_INVOICE_LURE' heuristic further supports the phishing pretext, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://philabc.ru/uplcv?utm_term=cbse+class+10+science+book+pdf PDF link annotation
    • http://taispacedesign.com/upload/files/kuxila.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/mojabi.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/zevurisatokimatoguxujal.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/susuwusebosulalos.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161305bc4e2ed4---rebewo.pdfIn PDF document text
    • https://alariel.be/userfiles/file/guxemeluwite.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/wafewepefasur.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/jimufegipurufukebelimo.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/vegizotiziga.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/razofuxazamebenut.pdfIn PDF document text
    • http://glassick.com/userfiles/file/nutirepetupel.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/86861568351.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210904_120916.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/seberafuvimobuwotadetok.pdfIn PDF document text
    • http://spbi.cz/res/file/raxetamekogu.pdfIn PDF document text
    • https://btegypt.com/file/65354058436.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/51b4f27156cfe530a79e03da5769677f/venavaxexeluxu.pdfIn PDF document text
    • https://redac.ch/upload/11530055670.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/64711055915.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/wopitamedojipi.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/80456976022.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/46948318618.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/xiwoniben.pdfIn PDF document text
    • http://markone-tools.com/upload/files/bizis.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/47377397428.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/bupefixog.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_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E5 17944 bytes
SHA-256: d2d3ddbe1a727759dc15997405dc372795cfd477d3aab835d34dfc3b95c2467f
font_02_sfnt_off00012658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12658 10852 bytes
SHA-256: bf6c25cf1bdbcc2648aed5085dfcb78babe0741722c1ab3f032bcceb60b9fb21