Malicious PDF — malware analysis report

Static analysis result for SHA-256 997ea2ecf7b1238c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 22:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2feadc68f5852be0073d8914269f179c SHA-1: c0c763405715fa906f366500238478715e578e7d SHA-256: 997ea2ecf7b1238ce299c976b923db86f2048e5fff3427d9e1cdfa0f4aee5a08
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. While no scripts were extracted, the structure and numerous external links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://panificioilcavaliere.it/userfiles/files/8799477962.pdf In PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161373e2a103bb---vozabusa.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/83481997188.pdfIn PDF document text
    • http://mc-opony.pl/files/file/39357408290.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/86432480635.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/59982123270.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1631109343NK5D.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/ziwiwojixepikivesufoz.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/dimulesemukojazig.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/zelasisomapibididunep.pdfIn PDF document text
    • http://szm.hu/userfiles/file/23362159309.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/67892873263.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/werususuzisaxexuwakibubow.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109090445108653.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/xowipevojemumote.pdfIn PDF document text
    • https://sim2007.com/files/47649859949.pdfIn PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • https://hoongnau.com/upload/files/xoxesu.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/17668926405.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/nelimebixe.pdfIn PDF document text
    • https://angkagenap.com/contents/files/jeduxotizepuxudogasaxip.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/korafevoluxasulu.pdfIn PDF document text
    • https://arerp.kr/data/file///15280175758.pdfIn PDF document text
    • http://asfalon.com/__files/file/fowolabilagotoxoledex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=sur+sadhak+app+downloadPDF 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_off0000e00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00A 10520 bytes
SHA-256: a6544d662e9a583ad5bec9631ca25335bcee2f7ff32ce26e65da856c6d63723e
font_01_sfnt_off0000f7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EE 18404 bytes
SHA-256: 0e34693292372cf416ab866c5c4052a063b544608c1912f58d9d9ca891fbab37
font_02_sfnt_off000127a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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