Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba82355a94d6c0a8…

MALICIOUS

PDF

93.8 KB Created: 2021-07-07 05:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9f083ded790f57d2f2677b3c489b1742 SHA-1: 4e1305d12d1c7c00dab3ee22c9469118e4efff3a SHA-256: ba82355a94d6c0a84c09ce53ab0105f243a762827dd43b525df9c32929fba5d7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it's a link farm hosted on compromised or disposable domains, designed to redirect users. The presence of 'reply on email for job interview' in a URL and urgency lures suggests a phishing or social engineering attempt. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://sllight.ru/design/img/upload/file/36202864038.pdf In PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884fe04b05e---46219222634.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/88785655832.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/92074977865.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/e5768143fae3852bb00dceb40fd3e142/vifasenuvedijetugove.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5442c303---mivosi.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/manadet.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/pesigegaxibusi.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f367ab5119---46048834001.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/47635460851.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/2107454268.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ej6osi8r1q2a9m7sqo8rdtev1a/69261723224.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/3bb9b2c91f6173646da53a09ac82e235/92691016805.pdfIn PDF document text
    • http://www.mediagrand.hu//data/editorfile/11672575802.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160af50db54679---zemeri.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/8174b2d6dfe738db75f86c0b6e369d91/35570067906.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xululenurixozutelumu.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/b29753eacf11e0ad56bcbccafa6d4ff9/vejirarif.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16078826780cf7---dipupipav.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/bulasuzemizamen.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/juxuvolosakij.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf75855348a---60345683046.pdfIn PDF document text
    • http://cy2hand.com/userfiles/89614045790.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/66696141875.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/349ad9ba7b2a2b89157575980fc49ca4/77087850961.pdfIn PDF document text
    • http://soles2walk.cz/data/file/pibelozupugiwuzojidunewot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=reply+on+email+for+job+interviewPDF 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_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 18032 bytes
SHA-256: b11314124c6ecacbc751a4a93254ec3add176f5e4b37d314a2517a057776c168
font_01_sfnt_off00013887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13887 10932 bytes
SHA-256: 5f417c592a79bb1b98b1183b8e6f41cdbaee2d4c0fdf63f475449a7c0524619e
font_02_sfnt_off0001519d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1