Malicious PDF — malware analysis report

Static analysis result for SHA-256 072abaff926ce385…

MALICIOUS

PDF

90.5 KB Created: 2021-06-17 14:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a007e7fadf832d3f9213142373314d4d SHA-1: 81ac46f8b90854b659809724b63d0edb5f09efe9 SHA-256: 072abaff926ce3852ade69faf0e3970901042cd418dc7fac9435201c8b04855e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://happyhanool.com/ckupload/files/rugop.pdf In PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/c070ae16456a312b6d48c30434403b23/pidudifaluxuziravogimar.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/m6duopb047d553ftbuf8oe6fh2/18589804005.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/41822432676.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0075b668c0---xerefokawuleput.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/nuzeburamijodipo.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/1ad5ec7a1d72a61a1e50b246348d61c5/83843734869.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/17391990073.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/pukeweponuzipemifuzajesaf.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b092ea4e037---13932019809.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/xepuposomuxa.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f2ce0b2c2---78837815666.pdfIn PDF document text
    • http://charivne.info/images/file/boruzowuwewawabajivagola.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609b44593e72a---37336383932.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/85522661252.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/dunesilugefolidavil.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608793391bf59---pinagexir.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/21631560517.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=recommendation+letter+for+student+from+principalPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AB 5192 bytes
SHA-256: 49658df315e8bd9b17dfb0e546c90141d96d24660caeeeb266f7861a368e0527
font_01_sfnt_off00012b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 10476 bytes
SHA-256: 933eda2494ad4271d79aed5f1a48e59cf2acf041c92bf96fa9a2cee6bbb83896
font_02_sfnt_off00014e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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