Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72a1cc8aaad35b3…

MALICIOUS

PDF

82.1 KB Created: 2021-09-09 02:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 00c6f37df7326ae98364dc1f5d50b163 SHA-1: 9ef79be6cae3bfee00bd314db0501880dbfc8f6d SHA-256: d72a1cc8aaad35b379f82bc22e5b3dd99984c22b55be0dcc30d6754cbd5a3722
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it's designed to redirect users to malicious content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pemaboutiquehotel.com/assets/userfiles/files/52637921598.pdf In PDF document text
    • https://aljuboori.com/userfiles/files/12537914532.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/67699493127.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d7bdaa5cf---wigitikijatimelopif.pdfIn PDF document text
    • http://wiskind.com/filespath/files/20210907165911.pdfIn PDF document text
    • http://markone-tools.com/upload/files/zemolurepegopawisinaro.pdfIn PDF document text
    • http://adidravidar.com/ckfinder/userfiles/files/jojevavaz.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/xulibamimosobigonefuz.pdfIn PDF document text
    • https://promise-land.com/upload/file/11806902245.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/jomoso.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/36341613934.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/rututunanoseliviwujipa.pdfIn PDF document text
    • http://dejede.com/userfiles/file/wenosolejowekewozi.pdfIn PDF document text
    • http://phelieuviethung.vn/upload/files/8213532315.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/19540935815.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/vexokulogetupolix.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/93927814752.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/pirolojaresusitufoxibulu.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/zaroxopofimunipax.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613425e758707---kofurobirudevedipoxe.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210904052435.pdfIn PDF document text
    • http://kgmda.com/upload/files/nuvopilusunimi.pdfIn PDF document text
    • http://castel.lu/userfiles/files/zajibawobudozisojuri.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/31081559077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=jurassic+world+lego+download+apkPDF 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_off0000d0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A8 21684 bytes
SHA-256: 669653ae4b53cd8c25c66554dd8fe1ff4844ae5562b60518fb77ca009010f5aa
font_01_sfnt_off0001098d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 10860 bytes
SHA-256: d226bc477805b74b606209f1b3951702f73cf5446d5c5dced76f9630b064035f
font_02_sfnt_off00012295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12295 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1