Malicious PDF — malware analysis report

Static analysis result for SHA-256 60171a762840cda0…

MALICIOUS

PDF

81.8 KB Created: 2021-09-06 21:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: afcdb4aaba412379ff0cabf712e387f9 SHA-1: d797a7f254b4be06666f4c1372fd58c69ad85765 SHA-256: 60171a762840cda026372ce89bf3d6d408c764d4b01b510adca6dc0b161fb10f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of PDF_URI and PDF_RANDOM_URL_LINK heuristics, along with the ML_NYX_PDF_MALICIOUS flag, points towards a malicious PDF designed to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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://garglob.ru/uplcv?utm_term=ucareair+humidifier+manual PDF link annotation
    • http://paitoonbox.com/userfiles/files/20003043631.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/53685802857.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/rasapuwiwegodazad.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609417f23c505---mevig.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/pedibezewefite.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/lesodamefosupakilaxupiz.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/48544806070.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/rimiralelejugenonizelu.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca973c05d7---38974162642.pdfIn PDF document text
    • https://hanomanberjaya.com/contents//files/15634129747.pdfIn PDF document text
    • http://developmentassociationofnagaland.org/nbloom/fckuploads/file/75397036545.pdfIn PDF document text
    • https://anup.bo/images/files/15167873553.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/xafadiravudojasabamo.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/bevinakonejanufuposuz.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/nivizazarod.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/risedavobezukoju.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/84167442768.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/pugaradobon.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/7b7444edeb7ba9cb92c5a6b96cb4b0b1/2807792306.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160dae02baf313---vifuvaxaboli.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/kinatakubobonovigif.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/84040267645.pdfIn PDF document text
    • http://roocenter.ru/upload/file/43472363884.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/bavopijugotitexararezupel.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/abureduveridoxugo.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/75f1678ffb4bdd827647440dc7df64d1/75718453789.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_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 10460 bytes
SHA-256: 190db0735ff77a84580ac5f0c56d2bb38a9190cae635fb00aceceb8274748483
font_01_sfnt_off0000f59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59C 16800 bytes
SHA-256: 0c1509be11c6ac383aebf47cafdfee7e12245b9212267016a1d7ce5ffbdc3f4e
font_02_sfnt_off0001215c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.