Malicious PDF — malware analysis report

Static analysis result for SHA-256 07434aabccda4c42…

MALICIOUS

PDF

84.3 KB Created: 2021-09-03 09:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 50e5d52261c5669df2a8a45cfeb59e03 SHA-1: 2a09c51125231dedecb25703681178ef6fcb23d5 SHA-256: 07434aabccda4c425d0725894cbf0410860cfbb11ae6749fa98ad5a52de5b856
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, many of which point to compromised CMS uploads or disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were explicitly extracted, the nature of the embedded links suggests the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.2133

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/6cfbddcbb42b44047bc75a75c7cab386/10395584079.pdf In PDF document text
    • http://soft-pro.hr/upload/datoteke/51204801525.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f7d00371103---fobupapexefurimudorobired.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb292b1ac6---rugigewalosuzananafenifo.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/70967385881.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/vagolojulovesurigirino.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/biduzamuxenawemitub.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/19385689593.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210628_BF299444EC73CB47.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec57e20df7---xakifapawufasaxezino.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/bawixokujozoxodapovuzami.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/93656778307.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/disakoluzutogimujunaduw.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/kiredakeb.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/91111303839.pdfIn PDF document text
    • https://27061010.com/uploads/files/202108271935416562.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/jorus.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160765f6ab8b79---34824117123.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f69e1fcc0---93481627037.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/nozamapegatagagabikune.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34e4323abc---gevitilefin.pdfIn PDF document text
    • http://isvpro.com/custom/files/geruzejiwegipakomujaj.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/ninabogiv.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/manewubibijilosuwukusibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=intestinal+intussusception+pdfPDF link annotation
    • 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_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001061d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061D 10564 bytes
SHA-256: 116d5d96ac65e4fe9efa3242d6b77d7ce9d942d55de87e546586f4965a074ff5
font_02_sfnt_off00011e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4E 18480 bytes
SHA-256: b48a3654c9e2226780110fa4d35227882b22afee6bc978a692d2afbeacbaf377

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