Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fce0364b98ea3e5…

MALICIOUS

PDF

83.0 KB Created: 2021-06-30 12:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 282082c100f539cbeb85b26d973e68ff SHA-1: b98e2d9f1f768993ea056e6d7dbf4c7685c6ee05 SHA-256: 7fce0364b98ea3e57681688b167c9a5ee2a9776aa64dcf7a0f2e65052f768bd4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body was unreadable, but the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/seacv5os9u9gs1ge2l46n44m15/badibuxebibotebopobo.pdf In PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/19896372793.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efff3dec80---81604887024.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607222d404cf5---69626850103.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ca3294fc4e714ebf799450a3cdb76e92/64785172221.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01a648db62---rilawififafobe.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16080e81d204cd---31792643289.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/39c5d292925bfd4816c879579782a625/tovaponefukepirudedagolub.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/69773454362.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8730c3224---61357719157.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/d2e360198a89351d99083951b25925b8/88775740782.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210629_E8409093FF948C5F.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/99999318192.pdfIn PDF document text
    • https://zold-kommando.hu/files/38259289637.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/30668972737.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/52555863328.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bddbf0771---54517227324.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/9894a77b9f72b42a7ea1c06b75aee960/lapoputamuf.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea611efe9f---sujobelatowufejedaz.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/e806e7b067fe0f143c3041a97b17f605/pexowivawuzu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/413386ae1a88ba030f135d1335960b9a/ganimopevopakuloveponese.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/94b03e540d2376f186c5be7b65074140/rivarimorepokorid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=have+you+seen+the+old+man+chordsPDF link annotation
    • 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_off0000dee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 10816 bytes
SHA-256: b4799c25d497f38e76fb9183c79fd24db5c9205e128779b70ba46210b94d9905
font_01_sfnt_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 17308 bytes
SHA-256: 64cf449870c651dbba7f287a6c980cd84ead54955fec7ffb5d4ac33d91286d9a
font_02_sfnt_off00012564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12564 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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