Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccbf204b4b6ee9c…

MALICIOUS

PDF

86.8 KB Created: 2021-06-26 02:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8c8c342ac5fbf453bbc7cb33285a9537 SHA-1: 589db76304d60ed9f1a8c11c88ad67ca34f8930a SHA-256: eccbf204b4b6ee9c53034ec432d57b90dc91d1e3f6add2e17821e6f2a3e9d494
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, which flagged it as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious destinations. The presence of multiple distinct hosts and UTM parameters further supports the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://irlanc.ru/uplcv?utm_term=dry+skin+dry+mouth PDF link annotation
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/216mdddpm8mou9p0e52fls60s5/seramawoguvumaxime.pdfIn PDF document text
    • https://cecprint.com/images/file/51583409124.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/dl48h1qtfebkscvqbrgu3eg8mj/36658979353.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fc9fa2303833d795e1ff7a714645820e/zixarez.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/banazoru.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d69a697f52---xunimar.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083a0b09f8a2---nepetujobabomi.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/88969163059.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/a6825c7277bfeb893b99999c2c8f638e/66057132645.pdfIn PDF document text
    • http://ximangsongthao.com/app/webroot/uploads/files/vidokamu.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/78455131975.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98a0638f5---gutitutolokezokenesase.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/54207776231.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/aae2657c5f88932754c737b0020f05e8/61526573407.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/sopobe.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/a14095f6a87186d88b6181f1863d762c/zaganegexotererebaj.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/fe3ebd3b501dfc26f9621a65a85b43f3/73772165301.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/18592951713.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eef773f7f2---81628459882.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/sajugu.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/midomuveluribadapi.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210516232539.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/400fdd9a1f5259ce5ca6d2f06eecb9f4/judivujen.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_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 10480 bytes
SHA-256: 139767d455600e1e9ff3f7d2d2d9be2777c4cfa40ad80b841a708a1aa742688b
font_01_sfnt_off00010a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12287 16912 bytes
SHA-256: 0ab9974084c93d4cface5623c9d6fd6274165a7ef3fb2a851da1eac4f6c4adf8

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