Malicious PDF — malware analysis report

Static analysis result for SHA-256 748d6ee4bf46d46a…

MALICIOUS

PDF

76.4 KB Created: 2021-08-08 14:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7a3281abe96c9466a665f4ca24c17b22 SHA-1: 66f99cc933a6eefa31307c5b28f27f4259f36deb SHA-256: 748d6ee4bf46d46adb5ee2799c8f7d4bd940f378eb6b7008e123e71dbe1c5998
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs and the overall structure suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://netmutum.com/userfiles/file/55581828659.pdf In PDF document text
    • https://giolog.biz/images/bulk_images/files/32378493607.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/v50kdtc144c8ei1330vt25c171/jonajugofet.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/28648986012.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/zovimazididivemo.pdfIn PDF document text
    • https://diaspoassur.com/wp-content/plugins/super-forms/uploads/php/files/2bdfa0cc195406d838b5d5d57bd45312/rosipimewodasejizamajobo.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/4qveg7q267a6bfa889jbkq13n2/31718627620.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/jafetukuputoxakijobox.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210712_14D9542970B8DC39.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/39771224135.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/l8v46fe3scp4dlkuk8ok4f8pj2/29341818630.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/khs9s39nl11ec8esht3o672fv0/kiwopatupoteru.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/fisatogakemezamekuxoz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5adcdea8df---38916381298.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/69987617587.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/giwuxakupamopu.pdfIn PDF document text
    • http://hodori247.com/uploads/files/dokikezuzazusefebanix.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/11021074263.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e2077ce00---19733738456.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/358908120fb947a7e6afd68f9ae4cf65/31802817087.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/piwob.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/92820458603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=kenmore+washer+series+500+manualPDF 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_off0000c9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E2 15980 bytes
SHA-256: 272f95b5380d75c7d7aa9b2c21081b544a46541968f77194489e3dc1c19d2580
font_01_sfnt_off0000f2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACC 10708 bytes
SHA-256: 4f53a3218b6dd935f0a1a3db09f6baf4194371fc995b49a627708a57bda83566

Open this report in the interactive analyzer, or submit your own file for analysis.