Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f028dfa5ade7684…

MALICIOUS

PDF

89.8 KB Created: 2021-09-12 22:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e0a39a6fe949bd124bcebfedc0cdf597 SHA-1: 26420001f7ae78fcc6dcc2756f255f589832018c SHA-256: 1f028dfa5ade76843692393bf07866d31a227798da2720aebe51f6f3124336d9
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which are part of link farms hosted on potentially compromised or disposable domains. The primary URL, 'https://pixomot.ru/uplcv?utm_term=facetime+android+2020', suggests a lure related to Android FaceTime, likely for phishing purposes. No scripts were extracted, but the structure and URL distribution strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 6

  • 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 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
  • 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://pixomot.ru/uplcv?utm_term=facetime+android+2020 PDF link annotation
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/36766251709.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/83608438240.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/mirumo.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/58f0082567ea1ef29c8a5073795c83e3/86960581063.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/muwigazolegufegezovoji.pdfIn PDF document text
    • https://gangnampools.com/contents/files/jekidamipeboni.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/40968070908.pdfIn PDF document text
    • http://cityfate.com/files/files/69469032406.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/sedifimijitelimemomepe.pdfIn PDF document text
    • http://airmon.hu/images/files/8959727899.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/selikatakajusatoful.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/pomebenufilejobuwitot.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/losekabubutido.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210902175625_1893804029.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/1617874414.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/19830323502.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/32563353619.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161360d62e6d8f---96421000520.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613847718d68b---22253890221.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/wutijore.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/fubakasotadovolegapuju.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/59057466859.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/90599519860.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/14053954182.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/pufoxefuladabu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off0000fab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB9 18044 bytes
SHA-256: 50838349dc2b4c5cc9520e0104984c4b712fc48f87a1b3d7c97395fdb37fd121
font_02_sfnt_off000128d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D0 10536 bytes
SHA-256: e93507f98e77f2355248610d067202162b306e7af3a83868621e0b845757bb3f
font_03_sfnt_off000140d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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