Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67954e5af727467…

MALICIOUS

PDF

94.1 KB Created: 2021-09-04 10:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b0de4b3047cd76b65c18072673647965 SHA-1: 295b64b2ffd71e6643f7b79d7f5bdab0228d03b5 SHA-256: f67954e5af72746759710e4cac71a0e501050b0de947c02703d6ef5300943900
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers confirm its malicious nature, identifying it as a phishing trojan. The embedded URLs suggest the primary function is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://aristi-trap.com/upload/users/files/85632710096.pdf In PDF document text
    • http://angelescare.com/userfiles/file/towakenosi.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210503081105_203666395.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/32825316475.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/penidosorigu.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/30143523944.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/70354674246.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/01f46e811bd8ec81e5b0a6680d620f36/52765118360.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af17a08aae---fisejuvojazip.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/sdo5uo3m0djdtdqandtb2dtb34/66093830257.pdfIn PDF document text
    • http://laduses.nl/image/file/10412789159.pdfIn PDF document text
    • http://mgrima.com/files/file/zorasuwazo.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/56088a8c22a27c2d2aec53f156828a25/watufan.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103ecbe00c83---jebowudif.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3b5b200c---23599728802.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/jibajikafugajunez.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/jakesumej.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/gomawipasujenuka.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/94tt066a79banvgi4msrpohfi3/89518093898.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/sakuru.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/wufusu.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/65e93f6cdeb40872eb2601396d9d487a/71404850326.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///zabow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=couple+serrage+facom+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12164 18916 bytes
SHA-256: 60a91f9420819768ddcd35c808cc10f51b546a84e5774b775405d9e1edb71624
font_02_sfnt_off00015210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15210 10800 bytes
SHA-256: 195f99edb4746adce6c271cff13ff5c06b1da00b89a1525e68ef1e338dbcb15a

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