Malicious PDF — malware analysis report

Static analysis result for SHA-256 980b61d2acf61278…

MALICIOUS

PDF

86.8 KB Created: 2021-07-03 15:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ddddbceff9052c82fd3b7e40507b69de SHA-1: 67084c5e220c6608232f5754c50d57ac8a3ee158 SHA-256: 980b61d2acf61278f5ff1f9504b3aeeeeb50ddc2a167e938c96e25cac5a6d5f3
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites, suggesting it's designed to redirect users to potentially harmful destinations. The presence of numerous distinct hosts and the use of 'utm_term' parameters further support the link farm classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/rorsjs90avdtm7qnri04p193sm/vonebabux.pdf In PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/dlob7v0f32bqsjqlk80t45uq35/33732565636.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/zugavibavepel.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/snqa48h63p3r056hvniat4qc53/vopurezuvoganetuxonone.pdfIn PDF document text
    • https://oliogalanis.com/file/48783409058.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/lavesajob.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4978850706---96205203049.pdfIn PDF document text
    • https://actor-conseil.com/files/file/lorimobewe.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/86ed092827e421c1d92c54b201f123fd/jizadolujuxufape.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/d1402ad5b8b2770336405715d5ea6322/ruravadasibilota.pdfIn PDF document text
    • http://wamer.org/userfiles/file/fokaxon.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d189f1023e---bazirapasiraw.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/o6ajhf2q34f3ofd981av6re3fj/22899959088.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/88751203681.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/lisagamixeluwana.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/f4c30f5b463f6a349e104717fd815b36/texip.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/ekubaofa3ocla3dtvvlip3vnlr/tufuded.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/najofixarariwewu.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07ddb26e10---22528594518.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/62bac564348079d14874f4611a735ef8/28551959031.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3d019526d---xibal.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/v06g6j3usmmildoudphilfcjjh/rizujenaxusomugedet.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/tafavijabewoxutabisisad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=chinese+male+names+and+surnamesPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4f0df5634b33db71a7f97c17b5e74b34/vodetasogetuwevipereb.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_off0000f0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C0 18256 bytes
SHA-256: a66926c8d185c63eebd171bf64c8bfffc12a3aee2867e54e648c084960f551fd
font_02_sfnt_off000136a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A2 10428 bytes
SHA-256: 4096090996c837ce8b96826850084b50313a14b57e6717ac738714d6ef4760fe

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