Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb1b629018bc38c…

MALICIOUS

PDF

89.7 KB Created: 2021-09-06 02:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5ae2e9c43712a22d82fe681c771076e5 SHA-1: 161b05fb785f7c8a3aac0786096e7a4f30a69b38 SHA-256: 7eb1b629018bc38ce08574c24d6556f49866057682fea3298106750adb2b7b3a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The presence of multiple distinct hosts and link farms indicates a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://smidgel.ru/uplcv?utm_term=subordinating+conjunctions+worksheets+for+grade+5+pdf PDF link annotation
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b451b0ead07---4737511615.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782e31d84c1---63162143593.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072265f25235---72518871499.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/96894939414.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb62d763ab---52639096684.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983931b3c44---51169532413.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b1c0a5629---mujalexexiluzijejogi.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/nokopidif.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/vewemolubiwokiziposupamit.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/ratifakokagobanefano.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/wesupabudekerowax.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/nakakekigagabager.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/b78a164336a52d459778b8850bae3384/nixaferukape.pdfIn PDF document text
    • https://immobiliaresancarlotrieste.it/file/78036936970.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/savaboze.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/17707663425.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f215bd6879---peruxeridirogukob.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c009844bf03---lusidemukinejeza.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/xikikasos.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/21724776208.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/i53df1gulfuv04kdhfuuf1gua5/bawadanared.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/4423e4acc9ecf174bc44079ccbe39a09/24809727185.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/97044564448.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/tarenitiz.pdfIn PDF document text
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/bededukaneguposerekijinam.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_off0000f416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF416 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C28 18804 bytes
SHA-256: ea0aa6055edb9d5a94b9a459d23e9536f06c46c8ab92d8a67a5eea5fcf535722
font_02_sfnt_off00013d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9F 11608 bytes
SHA-256: b88cb54d4eca0bd6241f028a0eca65875dcc0e3e718c31b4344150239892c27e

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