Malicious PDF — malware analysis report

Static analysis result for SHA-256 64dfe7de9762dd6a…

MALICIOUS

PDF

79.9 KB Created: 2021-09-13 11:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0add0a7b07132a6506e6dbb0616a55dc SHA-1: de709985279b9b3411cf95738488834cb9de3ec9 SHA-256: 64dfe7de9762dd6acc7341acbb72368efc7b8a77bc18cf685ca9592beb7cccfe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were explicitly extracted, the presence of multiple external links suggests an intent to redirect the user to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://mkontroll.hu/File/dipiz.pdf In PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/63679691049.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210909030343.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/26012615720.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/puwoxuren.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/81905899796.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/fivej.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/25839646776.pdfIn PDF document text
    • https://aqualibramontois.be/fckdownload/file/zivotup.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/69396305573.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/51738548775.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/99080315151.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/dukijokepetofoferuv.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/wobufifesi.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/18610657420.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/19573374767.pdfIn PDF document text
    • https://keongracun.org/contents/files/rotuvexokip.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/modajonafozivovumi.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/30173580071.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/22645844637.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/pitig.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/lokewapipa.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/ninenajanopuxef.pdfIn PDF document text
    • http://agilesolutions.in/uploads/fofugadoxobalilikezavimi.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/jesoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=ideas+minecraft+housePDF 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_off0000d4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 10744 bytes
SHA-256: 721b49b09e7fadc6df763cec30e58c70e5dcb15f0f0c8a8b3dca0ce976617f21
font_02_sfnt_off0001055d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055D 17192 bytes
SHA-256: 2321b914a95b29f8669515c020cb500714d3c420996c8258b270ddb08dd2b497

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