Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf62ea48859b4f1…

MALICIOUS

PDF

95.7 KB Created: 2021-07-04 21:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 744a0c9e530cc7441f740f1b57e51f8c SHA-1: 526aa17498bc1e0204ae660e1e8b20cf4f2ef909 SHA-256: adf62ea48859b4f1b88bd6ada45e4aaa82a2a359d34349e844268235490abbdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. These links likely lead to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/45004143595.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/56fc354ffd8c4cece1639ed5560a0e02/46628665308.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eca1c942c5---dijakevedige.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160874bea2204d---56335506443.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16071e7e25863b---xabapixegoba.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87214fe88---97417685198.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9fa27c818---35041802214.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b126265ffd---nolibonubobana.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/44t69p2a92l13cv0ip16jh42pe/jeduxokazizase.pdf
    • http://bet-balance.com/userfiles/file/91854708700.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c71afc28995d02c0382303cc40caa6c8/3926549225.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092214a4ca74---21182555361.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58fb1503bc---6077034296.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b26c62ffa4---12143740190.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/m0kk2a61vp7tm1fp67ttm30195/worexugaxutuvapas.pdf
    • http://bpabv.nl/uploadfiles/file/13985298555.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/245aca42afc5be03e019f681d2d7b17f/gixiw.pdf
    • http://innotec-industrie.be/userfiles/file/7361911888.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c0f022ae1---43974137442.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/7a3q11sfdbf148ov4niekk2gf2/lawoxasovini.pdf
    • https://lanhcongnghiepthinhphat.com/upload/files/vomojupukidulelav.pdf
    • http://allycatering.com/userfiles/saxonuterijosafuzow.pdf
    • http://myshopekerala.com/userfiles/file/woxezexurafejipetepu.pdf
    • http://charivne.info/images/file/wunesogofujixufagunevuv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=rationalize+the+denominator+worksheet+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb70.bin
4486489dfc5fe1c680a26b602f052df8ce86012a8d4ae3b9dbe446010b0f63b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB70 16564 bytes
font_01_sfnt_off000112ab.bin
c1589026f6afc94fefa6bd48c6e74876adec21313c7e14c3cbd8d28a2c1c4786
pdf-font-stream PDF embedded font (sfnt) at offset 0x112AB 17272 bytes
font_02_sfnt_off00013fba.bin
dea20d58ec0ead4f891017707acc0e3b47decc392f6e352514a544fd5065cd4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FBA 10796 bytes
font_03_sfnt_off00015885.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15885 16792 bytes