Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d60bd623abe4d8f…

MALICIOUS

PDF

98.6 KB Created: 2021-06-27 14:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 732e812afcaa2782ae707aa9011c9d6b SHA-1: 1ae2a4bb50e856d7725253c24dbd856bcb10bb76 SHA-256: 6d60bd623abe4d8f1c8380597ec645e4ae88e548001fac2f669ea88e720322fe
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to compromised WordPress uploads and other disposable hosting. The embedded URLs, despite some being marked benign, are part of a pattern designed to redirect users to potentially malicious content, masquerading as a free PDF scanner. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9785

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://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/3377u24lsv0ftd1r6mfrup0cfq/lalofanalenekedazezipug.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be16603d04f---xixafipidaze.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a7abc5bac---16997968272.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b75f6d700b1---worepasobifipogu.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/sikokimudaxuxupupoje.pdf
    • http://studioassociatoemc.com/userfiles/files/94948725306.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bc9978cdc---rexopol.pdf
    • https://kede.org/userfiles/file/segodazufo.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/speaokubcf9bg6ns7eb8uvr9ae/zavoditijogofese.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf977bb9ef5---vikutezeriposimuxami.pdf
    • http://tandartsindex.nl/images/uploads/42551227920.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/30488d7ba694f297f1d0a0d9704714a0/36738324123.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee9cd5a8af---50880145757.pdf
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lafumudalowogaverito.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/nuoau0gcjedfp51rm9eq3c5f0a/xofosawaneta.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be344954ab9---84239834160.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b19219e25efe8557e09ca314b897d7c5/2613173759.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cceb7160b9---94151918840.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16084477a7f28c---62642498160.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a505a3b3ade---59836232944.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bfac17bd396---fozaxap.pdf
    • http://galluccifaibano.it/userfiles/file/79957164576.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b59ca6af93d3118d2f8eab3a27c1dd82/98196371817.pdf
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/bonubi.pdf
    • http://eltonltd.ru/sites/default/files/uploads/69143891805.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=clear+scanner+free+pdf+scans
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f5.bin
d18549a7693e6e5643e7967f8d95f5b59cf8b8daf4943325343c5aca4602dcd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F5 16200 bytes
font_01_sfnt_off0000f9c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 16792 bytes
font_02_sfnt_off000111df.bin
cbf6367b0a8dbe86c48441adac90caa43236936dee205b44e6adf47e16cbba55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DF 10332 bytes
font_03_sfnt_off00012947.bin
7ec7639f3b25f1c873ac87c5477ce627fe574cbea4fd8fadfd428a526caf0a49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12947 17140 bytes
font_04_sfnt_off000155f9.bin
e5b2e71d89b79176163297550dfd0feb1121df7ef7a40725b2aa8403d6240219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155F9 12316 bytes

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