Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30169ca2b20615c…

MALICIOUS

PDF

92.4 KB Created: 2021-08-01 16:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1755a71fb1ef25f08ae1bc9a97996582 SHA-1: 1350c71c81b5ceb69c0f96c347f365ab2d1e3229 SHA-256: e30169ca2b20615c1b556589530d3aff1de358eb4631e95a1b266e4092dbecd0
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/b925209748c91b955a7bdc2e9c63350c/64072256274.pdf In PDF document text
    • http://designfromall.it/userfiles/file/83670019646.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/10463948158.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/kusifarigilakagifivemu.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/ac50d8758cc41b12c157580d4f881bcb/befapegererijaworuja.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/seritugelirerekifeparotup.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/8c61baa150144fa85ba596ba44628535/momadivajovosarajutogal.pdfIn PDF document text
    • https://airshow-bg.com/file/93414527123.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/97477647604.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/tffhdve5f3cgt0ihkihuglik97/74509049091.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/80670390812.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/12801496330.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607473b0e069e---bedonazekakanumosanexoda.pdfIn PDF document text
    • https://5uempat.com/contents//files/belelovusurupikupa.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/3270692871a331541f353ce51401af68/63914962171.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cda334a028---65026272501.pdfIn PDF document text
    • http://www.emailposte.com/pictures/28067598722.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/508a128c9d1595679f73bbc4a4b97661/3510189855.pdfIn PDF document text
    • http://mfahk.com/upload/files/62809861641.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/f18869812d77a4f1341659f1a45ab90b/zozoridofu.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/cc1dd70037bbf7f127d560d6b5c420a6/19037187804.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/df5ec06892b9f046ddacc0a38344865d/xuvam.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/30142325468.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/9408979cc62182a78522ac3abc84cbb4/zifabepirapobibajiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=final+destination+full+movie+in+hindi+download+filmywapPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C50 11008 bytes
SHA-256: 34e5d4ce08773f0a56d80d6eb36f0996cb3a9b0c3b297be02c249937c34f34e8
font_02_sfnt_off000135bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BC 17332 bytes
SHA-256: bdbe08ec8835fe29cc57d4f86f67d9fb4c16fc86ebcc8cb0298006753495a6bd