Malicious PDF — malware analysis report

Static analysis result for SHA-256 106180a9e45d40a0…

MALICIOUS

PDF

90.3 KB Created: 2021-09-01 04:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 3cc62ce24e9b7881a315ac06b61d0775 SHA-1: 4cf953865be89766304e968c34e80f779b1c2fd6 SHA-256: 106180a9e45d40a0000137c81d5bd3c7810fcda47181b3476040deacd27a08ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics point to the PDF acting as a link farm, directing users to compromised WordPress uploads and other external sites. The presence of embedded URLs suggests the document is intended to redirect users to potentially malicious content, such as phishing pages or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://drafthe.ru/uplcv?utm_term=scenario+based+project+management+questions+and+answers PDF link annotation
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/44fb34332258bc967b0539c39474131d/jigifonulijaze.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608035daaef39---nutalo.pdfIn PDF document text
    • https://roc.mn/uploads/files/35872461981.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb4cd88aae---rikekeluninig.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe0e3006f6---wirizosemigaluxavosa.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/nofezezak.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/bibuvonujar.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210707165245381.pdfIn PDF document text
    • http://tyextractor.com/d/files/8312071446.pdfIn PDF document text
    • http://planetamama.ru/files/file/45736897188.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c367c57d18c3674fed0f8d690c3204a/tibupalidukagifit.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608b046161b2e---bigiva.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/9679847676.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/taxosudefudepu.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/wizijotaduza.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aca51c81739---88487167694.pdfIn PDF document text
    • https://agatanorek.com/files/file/viziwowase.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/sudijikatasutiwukonivagug.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912dd3364c3---36905141393.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/sefekudevojobilaga.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/paxipanapajinevitalipuwu.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/79945590036.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/debopepisapevozu.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/31012979995.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/28795465808.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 17936 bytes
SHA-256: e3834aa456e7cce4b29aa6850f605d72782583754712a830eb88938f430172ee
font_01_sfnt_off0001285c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285C 11488 bytes
SHA-256: a83c4e3f70f2059121ed94bfaf408791e73a21d1b23af49c917dfd9089d1d617
font_02_sfnt_off000142d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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