Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2000c6461c51778…

MALICIOUS

PDF

88.9 KB Created: 2021-07-27 09:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 484df6b5fe797ab5582f36afb6525470 SHA-1: 9c061f2853989d809e9ac4928598a780c1227e2c SHA-256: a2000c6461c51778b1cf60d93e7d54b3bae93dffa5214031dda19fbd1af6277c
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://shop-ecobati.com/medias/upload/files/xijivogewejemotemubepunux.pdf In PDF document text
    • http://www.tekkoo.net/images/library/File/pudugajuxifi.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/febomidogujafife.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608af3511ced1---88627830474.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/nogoguvorawig.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/69229c8437ce8b8d676b979b1e02643f/xigemalem.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/fipavetobekile.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/depegikopulasumafokiviv.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/82776450304.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/e6jvbag0c459e6bre9cn2914hd/xinikufuxixovadewi.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/birer.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/000aa445cb140e151bb26171bede0c63/92725460790.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/petuluwinefobozefejimuti.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/loxatesixunubar.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/56753246064.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/tebejizotuketu.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/puralepaveworiniwipozimuw.pdfIn PDF document text
    • http://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/modanabujawunusuvavuteto.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbce6e2bd5---26065834359.pdfIn PDF document text
    • http://unsersohn.ch/images/file/lerelozetokesomura.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/6940798de19e8999039dbd377fe5835d/taxapixukej.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/tegebalivigoxonipifadaje.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4978850706---96205203049.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=max+tow+truck+instruction+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_off0000f83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83E 10632 bytes
SHA-256: be6c7d1fe52f16c1dfdb79fc8f7dab6c098f3674fdd8e7a1465f39fadd99c7c2
font_01_sfnt_off000110a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BA 16784 bytes
SHA-256: d0b37816760e2dcbc5ff37a1a58b6a67b918f4e57963183f9cc3f20d16d185d9