Malicious PDF — malware analysis report

Static analysis result for SHA-256 001fe06fc2116338…

MALICIOUS

PDF

76.2 KB Created: 2021-09-01 05:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b09ff1ad12e9f7b02ac53e15ac9d5e5b SHA-1: 75aa7b8cb071997cf02cb7dcf08f8d9a2b9cddbe SHA-256: 001fe06fc211633882f276f4de442c4ec8d392b985b961a16258dbd9530de8f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many hosted on compromised WordPress sites, that are presented as downloads. The presence of a link farm on disposable hosting and a URL with a 'download among us pc windows' UTM term suggests a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://queure.ru/uplcv?utm_term=download+among+us+pc+windows PDF link annotation
    • http://fittbike.hu/files/file/witapa.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078785fef187---judodixojeradejabopiv.pdfIn PDF document text
    • https://seerupit.dk/assens/file/rakobakikiwenukexoz.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/61795926053.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/5hn5skjad9cglbkjtkmqm4lt44/porel.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/98494641854.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160950f4e723ad---repakodakobiditedi.pdfIn PDF document text
    • https://network-italia.it/file/besubuj.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/muselala.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a9ba068e7---76532046608.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/5aa8u00l3d8m6roqjepavl9gsp/deninunipuzowakakukogodel.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/wuxerodutadepowevadav.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19089bcb4a---64874497890.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/rowilapogoseji.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/kizavufisevoketilim.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/53061253846.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/41757593004.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609644dbe099f---ruzojujarujebufig.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a4d154456---92647900167.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/53534574599.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebf4a0bd5f---33166108867.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_off0000bf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9B 20000 bytes
SHA-256: 2d9c3b6a68bff68c82743ffd5319760ce4877ea8c2be08a4db23bff449bd33e5
font_01_sfnt_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 10716 bytes
SHA-256: cd713efbb906fe28b6759497b0255fd126e322895b8fa4176b9fab75ba73c410
font_02_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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