Malicious PDF — malware analysis report

Static analysis result for SHA-256 722f0a39019094c3…

MALICIOUS

PDF

87.7 KB Created: 2021-09-09 07:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 211774aa32d9da90918bd755ebbaa476 SHA-1: 01daf925b8b85470c9e0b01f0a0e81e9a8e3ef0a SHA-256: 722f0a39019094c3c7d0e82e7b47ff7521b2781f61b9cc1bdc20d83892fdaa54
166 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a social engineering attack (ClickFix). The document likely attempts to lure the user into executing a command, potentially to download and run a secondary payload. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://callmarkinvestments.com/callmark/files/45404353014.pdf In PDF document text
    • http://sun-apartments.pl/data/pages/45321507520.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/10016588603.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/48361745606.pdfIn PDF document text
    • https://mfdesign.hu/files/file/bematojidazojuwekusiluki.pdfIn PDF document text
    • http://clerus.hu/files/file/28459662187.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/34670833382.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/wevinatutovogujekatatevaw.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/29094033892.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/firozoxaduje.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/gudiwumogireravanegum.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/70645435264.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/delemabosu.pdfIn PDF document text
    • https://rm-parketi.si/uploads/tutukixebiwavewaruto.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/xudare.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/vafatuwudetabur.pdfIn PDF document text
    • http://vswet.ru/f/susojaxuv.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/lafowufiguxenedezopa.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/sajatamixededizenalote.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/14927136018.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134535483ab2---rudoli.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/zesapomekilizixop.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/4183787234.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210909070651.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/rujafozusipikavuxem.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139270403b13---88603793737.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/bivokudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+install+apk+file+on+android+tvPDF 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_off0000ece2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE2 10728 bytes
SHA-256: 0497fff917151f82c5ee6177518d95b29b9b3aebc2c421fe1d24aad6d3209d75
font_01_sfnt_off000105ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBE 19512 bytes
SHA-256: ded6fd6b1945a3048576cbbacb747b9c79cc961b9d707c08c6b083795b9d10f2