Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32393e6453f4475…

MALICIOUS

PDF

86.7 KB Created: 2021-09-18 22:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 346bd084b12c5878bdf10c3e2c6167a1 SHA-1: c3b7dd2e38fd74b181cfb89b01ecfe8f7307f8cf SHA-256: d32393e6453f44757d834eaa6840553ea1650fa5c890a3a6fed23c835464b28a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=world+no+1+game+android PDF link annotation
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/v389515j84s9c0lnlurrqhioa4/fakiwalag.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/13215734427.pdfIn PDF document text
    • http://thecountryclub32055.com/userimages/69862272317.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/57159404338.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/58083541898.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/90puhj5lp3fj5ugkklimjfkoh4/xisifikovomimijufo.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/wudivejudeji.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/xagarizazujusegelapiw.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/20082605837.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/61438da50ad1f.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/xowabuxomafugalojonaril.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/begifolizisevunofuveso.pdfIn PDF document text
    • http://xn--b1adcbbai1bezln.xn--p1ai/content/File/30826976505.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/12439952008.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143236272a21---6108820785.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/rabamofejigibokagawonime.pdfIn PDF document text
    • https://rafautama.com/uploads/file/39229483931.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/17969679425.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/nopozawixi.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/jusavow.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/libavogi.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/bivukuzuwon.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/koxumufibeburalov.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/rizimuduvutazejoxemorup.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/xisomomiri.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 17172 bytes
SHA-256: 3acb6e11bc9335e5e7990d66bafd73e926ee0a870bc5c3bbba4514464abf152a
font_01_sfnt_off00011ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDB 10372 bytes
SHA-256: 498c0adef0cc670014dd44f7737193dac8a77a036b063711708ea2d765cd8bd7
font_02_sfnt_off0001350c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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