Malicious PDF — malware analysis report

Static analysis result for SHA-256 886eb8d6a5bf5678…

MALICIOUS

PDF

94.7 KB Created: 2021-08-06 22:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1697885fc599fa7578c7b504d6f75ce5 SHA-1: 3c3faea0cb75dd30bd8bd25d57ee8bd40e2ab8be SHA-256: 886eb8d6a5bf567872857885ee01c4c30654365f7d5bdb9be7880177743bd1a8
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple compromised WordPress sites and disposable domains, suggesting it is designed to redirect users to malicious or phishing content. The presence of external URIs and a link farm on potentially compromised infrastructure strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://crewmak.ru/uplcv?utm_term=oraciones+con+sustantivos+adjetivos+verbos+adverbios+y+preposiciones+en+ingles PDF link annotation
    • https://basisnomor.com/contents//files/56948242867.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/gikomiso.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/kelowexinozurizowetageji.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/gtn1h65prepjl6vrvetmrhfuod/13459164711.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/zikemarenixemavu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b97343670---96783770832.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/kha3fqmb953sd69epg91no4oai/79380502403.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/3cda892048c5f267547b5f33c17de87f/luxuzifotume.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/xoxusepubisaxokanova.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/89792539939.pdfIn PDF document text
    • https://biocoils.com/img/file/32875907859.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/7431127664.pdfIn PDF document text
    • http://mousike.it/img_ins/files/74783267445.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/guxonuxurumipepib.pdfIn PDF document text
    • http://accronline.com/userfiles/file/pewojekomeni.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9dffa4eac---41358795618.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/losaje.pdfIn PDF document text
    • http://esistore.be/userfiles/file/kirukajefalolali.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad9e6ecfc0---21192335438.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/lupomizarivira.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/90802668158.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/f9cb6bcdf701b8dbc1e23fe963096edc/texep.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/26867755629.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a4133af14f9---82629273397.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/xizazafujazesulo.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/2jqi8k2q0n2uokg1r82qhu5h2u/45024732800.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

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_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 11264 bytes
SHA-256: 8c885c3b75aae206d8d15934aeac2fad2e721b327717661199c17161721b81d7
font_01_sfnt_off0001223d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223D 18240 bytes
SHA-256: 9da8082e0f674b23ced76abc6291c7866a8280fa85433ae5ebf8102b81f5fef4
font_02_sfnt_off0001508e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1508E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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