Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e58a570f17ef62b…

MALICIOUS

PDF

93.6 KB Created: 2021-07-07 10:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2a60a3549846af9a2ec7647ba68f9a52 SHA-1: 3fbe236b8f8341e197393c484d81b2553f12b48a SHA-256: 5e58a570f17ef62b444e6bf3220f4417e70217ca06a651abc4bd45de696c70d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to exploit users by directing them to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://coretry.ru/uplcv?utm_term=how+long+does+it+take+to+burn+1000+calories+walking PDF link annotation
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160706e59ecb96---sokufelikerisukili.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/28378544776.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080a3a91333d---64619586713.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/9hl3je3chc24u6bf1012p813a9/sakutorudufoxitulirusoxi.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/73ad5cc3ffbc99a3faa64a79ec9637e4/72197284595.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/14defcc7c89d84114226b4e6996842bd/tezan.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/3816c711ccc1bfec6d0dc7a46cd59961/51089541250.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/92199004609.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/pifopemogeterozojofat.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b78d854214232bd1f4c45f088d163941/rofodelikasajemomi.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/82386172378.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/dadoxokevatuba.pdfIn PDF document text
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/57965371947.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/xaroruduxiruderuvavu.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aab06216785---lozizesijekudesosibu.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/f5cb73334c597fb254e5c73e43012060/69572757606.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a392665390a---59668920057.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/e35f3f859e44c8de386877d4e4d7f8e1/sowepowiwokirof.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/q3cbqo2o0o7srlrd5dbmq271r5/43760696333.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/zaxorivaloraj.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a78e694749a---51523516878.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/zonatuxixaridisubiranumoz.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b6032beb4ec---48554827235.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_off00010c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 16656 bytes
SHA-256: 7af7e8bac61c7dad57faae40619c163bc7d578b079b5080c4d546bc77bdd0c72
font_02_sfnt_off00014f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F17 11128 bytes
SHA-256: 56d8def92d27efe6d2ff9136611c01984869de4785bded350b51a8b2b710409e

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