Malicious PDF — malware analysis report

Static analysis result for SHA-256 154ac5b7d7d9effd…

MALICIOUS

PDF

85.8 KB Created: 2021-07-06 01:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cd493143afc832d3d937db651448775e SHA-1: 731f69f9abbfa759ca390282717f36be0ecc8a94 SHA-256: 154ac5b7d7d9effd05afd6dbee5fc8f4ee6f487a962f1bbe2eb57a32a7a5f140
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, directing users to multiple compromised websites. These sites host further PDF files, indicating a chain of redirection likely intended to deliver malicious content or lead users to phishing pages. The ML classifier and ClamAV detection strongly support the malicious nature of this sample.

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 http://apogeeconsultancy.com/upload/files/lipebazovonemiwi.pdf In PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b592dac79---5094368348.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/8a8fe57edaf854ab6214738395c1c744/sudol.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/rowofazij.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/zuxamib.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/ltdcd7h7u6q7e4nmj955coppro/niriguponotuz.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/lumalese.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4ee7aa37859fec08c04e83daa82591ac/roloximiruzejegoto.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/16980830495.pdfIn PDF document text
    • http://ruresept.ru/files/file/bilavedutokepukude.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/96887989234.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/wolukodunuzeg.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d694adce00---81394441418.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/69724cc0863f0d0cb3719c3254aa5e70/53831196846.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16090f868d9fd7---63063586767.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/25745658707.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/aksu597o0l5pnt525rv36gs5kh/kagetabur.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966ffec4191---pikubofavosodux.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/5e62b87ea3ec42c70ecb7324a94b9c1d/70055712621.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/mesadel.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/tt22cd6ujn001705adtmge8dir/40322459243.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a04fc4ec039---mipexatatebonalevoto.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/2708488403.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/nisebavubofosove.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b6536375c69eaf9a0ef40880e9e0a579/20905345935.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=lymph+nodes+in+handsPDF 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_off0000ed55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED55 17224 bytes
SHA-256: 31d286277d01f690ae0917bfc0f1334652c09f7eb4eb210d673e2f70b384bfc2
font_01_sfnt_off00011a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13227 10484 bytes
SHA-256: 1cc2759b3f56377688ee1731c8198c57ec650e7517d099ea7ba6860348ea3f53

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