Malicious PDF — malware analysis report

Static analysis result for SHA-256 119f48bcb592bfd8…

MALICIOUS

PDF

88.2 KB Created: 2021-07-19 15:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 881bb1474154f39b261deeea189a6fb4 SHA-1: 125f9ee8a24898ffc9399fd9e08ea80b18caf163 SHA-256: 119f48bcb592bfd86ccbe6b341cbedbc451ad6eda3ce725644517944255d9ec7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://karunb.com/UpLoads/files/63644153661.pdf In PDF document text
    • http://www.dilipprabhavalkar.com/images/file/89666726816.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/68077051913.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b1be0a9a5---39712171728.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/30160142798.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/uijbacn83e2cqqpe5eup4vvhp4/tarenafepefibet.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/39471562530.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093b05854edb---96658654203.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/43d1edb784cea88c18eb5d88a99bf787/87178785346.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/74861978457.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/a8dff4e59260b89dd07c96a0f52aa791/74568958541.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c67f0771a40---99746297704.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e44dbcb7538---47114356378.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920dbe3f280---50552385669.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/10f4aecf1a778bfeca8d26540d4f0b71/newujamewilojexerinabevur.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/fapumufugamuborijoleda.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/1e64ae85a290f509050e0ca5dff39171/44156892124.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b2217b621---6150971607.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/63148583562.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/gejopalogidujimifokolugo.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6cffda30f---76981172710.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/7thpp22vh6m21t0rmof5r0e08s/60395087048.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/a84783a70a69735e13bfb5a7c75b8dce/59419991242.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/66221584678.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6b4e36941---67359483006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=harry+potter+and+the+philosopher%27s+stone+download+mp4PDF 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_off0000ef1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 10960 bytes
SHA-256: 29bcbedcef05d340db800a178194ff879a16e441e2279346c7cc7ccc2d9f785e
font_01_sfnt_off00010863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10863 19940 bytes
SHA-256: eb7da4f67124f408e343a8a319f6c2c9b2572c22f73cbbdfcf1dabae861efd6e
font_02_sfnt_off00013b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1