Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7ab52c960f0cdb…

MALICIOUS

PDF

110.5 KB Created: 2021-06-26 23:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 97ed78aaee4b6ca25ab73986801b108c SHA-1: 57a8d285a21a3fc5273e56ad3ee7e8b90c36955d SHA-256: 1e7ab52c960f0cdbf1beea76d61a4a03a2090c5bb72c789f18722b55e1627469
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, directing users to compromised websites that host further malicious content, likely a password-protected archive as indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5d29a10db---3396167080.pdf In PDF document text
    • http://brandnewgoods.net/userfiles/file/pegixasu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b97e64879b1b6438f95b42b0b618cdec/meperesinenamup.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/11344241798.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/72628695594.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/difad.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/kpe5aka1jadveqh814hea92sc1/velidu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac622998279.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/df86fcaaa3ffdc457fa4c5897102387c/6972913676.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/58776198343.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/11689560282.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/ln3uj1knrc547vt5l9egor0aum/dewigasaj.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084a5292e650---gevubofojobamalitilabarir.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/93q0pei7pb6c7s33pq6opa8tar/51278373259.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848e4a83676---54930036174.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/47192186587.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/23561190891.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b5bc442d1ce10b5b7b52d9c07a07bd13/15847242337.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160847f38a35d0---pazefukeveketa.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/57997314598.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/fc28f668831730ccda47a45d86c94c14/30745219227.pdfIn PDF document text
    • http://djapm.com/userfiles/file/galolumekuzet.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/59153315161.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=macro+to+create+pdf+from+excelPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B67 16584 bytes
SHA-256: 406876157b6f593b68d6c9d1cc1fd3e2a145fafa8358b21c17af92000e4d04e4
font_01_sfnt_off00016688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16688 10512 bytes
SHA-256: 441c64f42fd6b66646980e49017ae45776730028434794ea95db35113dc18bf7
font_02_sfnt_off00017e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19699 16236 bytes
SHA-256: 9f9c9255c0426c77c5b13ef22f4242f4f7095bfd8ba808a20cf1712cd58ffb40

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