Malicious PDF — malware analysis report

Static analysis result for SHA-256 852c0414ac8826f4…

MALICIOUS

PDF

67.5 KB Created: 2021-09-16 23:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f32158c16f27b18aecf79fc72610d4ca SHA-1: 44b15d68b57c617b396b6b971824802c1fc0818a SHA-256: 852c0414ac8826f459561c3dd71fa10af9e743d8ffc7e8386f1ad94f734a4650
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including an image-only design and embedded links to external websites. Heuristics indicate it's a link farm on disposable hosting, likely intended to redirect users to malicious content or phishing pages. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=reparar+memoria+micro+sd+desde+android PDF link annotation
    • https://volandovia.it/public/fileeditor/file/3832891540.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/vituvafafuwijokoxes.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/50954380004.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/45379492071.pdfIn PDF document text
    • http://synphabase.ch/upload/file/46984255425.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/kisuvugomafo.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/66085415043.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/76602143578.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/lujoduf.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/96267344297.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1c711ae77---wakimeforexatelusoviwaf.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/debetinivuwuzuna.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/30827056888.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/6d3f1539f58b357aa1fc2cc7d51f5aa3/61034282109.pdfIn PDF document text
    • https://charming-dc.com/uploads/files/202109122346469410.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a79383251d---lusunivukajabexidiwunivep.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/kalatoxigipopabe.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/51791655860.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/56587279873.pdfIn PDF document text
    • https://beaszemin.com/files/86296958814.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/93844508293.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/12185822006.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/58000741159.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_off0000add1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD1 10576 bytes
SHA-256: e3e4532dc16fd3533256d9f175989fb0645a9057078bccd133e9a4a1fde7e77e
font_01_sfnt_off0000c5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DC 14052 bytes
SHA-256: 46efc0e327d9335deca83a7b0f50eb32781b5d13230c56650f167bd3d745d307
font_02_sfnt_off0000e8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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