Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee44a4f9598e0504…

MALICIOUS

PDF

80.5 KB Created: 2021-09-03 15:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 66a04d0249071dbf091a58b9725bee2b SHA-1: 485f9695824cbd7fece602395c4aac8b19307980 SHA-256: ee44a4f9598e05042fcd3bb4b1b32752a2a368b9560718cfc992ff36f37d1113
184 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is malicious, including ClamAV detection and ML classification. It also features a 'download button' lure and links to compromised WordPress sites, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962dbd8f9b4---47932182825.pdf In PDF document text
    • http://sahamit.net/userfiles/file/23431805753.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/56922095592.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/l13fbcbq602dhgf6ccsgnlovg7/zonij.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/78638133056.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/75888085276.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/xuporuzaz.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/3df590188819d5b8fde3a748607fe14e/xutixisodumuwe.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/wezilolilunizamas.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/nupifazoronakuj.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/1e7fceaa3d9fe97bab17436ba4f429d0/66402762468.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/3bb65a4d7258d04caee92192ff2df22f/53219491364.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/wevoj.pdfPDF link annotation
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/zamovopixitapi.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/32779288243.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/vabarilix.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/73968911754.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612d45bf1050f---jigaroguvumifolol.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/52766007127.pdfIn PDF document text
    • http://tsmsaldature.it/userfiles/files/mijulowif.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f15f0de5---meloxakuneterirasa.pdfIn PDF document text
    • https://0900107678.com/upload/file/zidazutojonajipimosawi.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83dd63c36c---tivizevizatesojerenizu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=kannada+vyakarana+pdf+filePDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4b462a4b29aeb703b2555efbec05606f/xuxupez.pdfIn PDF document text
    • 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_off0000cbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F8 20952 bytes
SHA-256: 52936f8415ee7d196e0514e31b16db6abc03dc6715a5f4f4541db5e34372385b
font_02_sfnt_off00011b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B21 10368 bytes
SHA-256: 95aba4cf650178848d45178182471b93400fb3ea2f6e2119a5c8458fb3014d75