Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0e6a1e10a8af27…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 00:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c6eb5786334536ed04d813e481ea9ee8 SHA-1: 95dde06b2e05a72a74052ee5892069dabcb2ec61 SHA-256: aa0e6a1e10a8af277aef41a0f0831b34e941a46f5bbc03926240a7cbe6fb5851
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely serve as a distribution point for phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=scripture+about+lust+of+the+flesh PDF link annotation
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612dd2f81b1b3---49849799310.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/62963839204.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/sekolibuzujajaz.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/lewidagiku.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/1992055643.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/4188864927.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/4448229955.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/adb06a9c2fd715b6c14e26921d49f4aa/poxojupenaku.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/89481249144.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fb342da00---35391031789.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/btm7fcmlqjqrfc3q8j20ukqvnm/fojidisaxuxoxosa.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/52801743849.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc9b96532---fuzowixemabewuxarusapetek.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/zinimenujamij.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607972ab40106---mozosogasugofudedulus.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/wuloxupigat.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/4819702152.pdfIn PDF document text
    • http://stembridgefamilyreunion.com/clients/0/0d/0db03be1a97f3028174cafb645c8c91f/File/malijuxejilibuvarowun.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/28142613070.pdfIn PDF document text
    • http://spiregene.com/image/files/20210627_152030.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/89089292474.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf6146e10d---detej.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/viditegez.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac47b6985a---61399975903.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/78155722999.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_off0000e1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AA 17884 bytes
SHA-256: 6e9e28b798212f2384d8674232cbb862dbd4864f72f70cf9b69898d2716fbe37
font_01_sfnt_off00010f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12778 10788 bytes
SHA-256: 317d0d47377a6894535c96cf901872e2699d04cfd8cfd4bd5eb2eadebaa47fc3