Malicious PDF — malware analysis report

Static analysis result for SHA-256 014d478effcbcb06…

MALICIOUS

PDF

79.5 KB Created: 2021-09-14 10:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8a36513cbf84af92f3b098317a37acce SHA-1: 1adc571547a6461806e9c01b1ffabf479cb00e26 SHA-256: 014d478effcbcb0610165b6341827707e1173963a2172a9c8a57cd3fb8366802
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic analysis indicates the PDF acts as a link farm, hosting numerous links to distinct domains, many of which are unknown or suspicious. This suggests an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huabulaw.com/uploadpic/2021-9/file/2021091212513773499.pdf In PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/5262f9e1819837c7f10285610f85a1c1/zinogaburunuruwalobani.pdfIn PDF document text
    • http://mobil-tech.com/files/62904194582.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/64599163692.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/kunowu.pdfIn PDF document text
    • http://greensquares.in/userfiles/file///lenomafogewigukenavema.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/1004383037.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/68189959654.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/77343353343.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161382918485e4---90614232672.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/86488762264.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210902_192053.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/vedojetuba.pdfIn PDF document text
    • http://tomdythai.com/userfiles/files/wuvig.pdfIn PDF document text
    • http://herve-coiffure.ci/files/40725783566.pdfIn PDF document text
    • https://terracell.pt/images/file/lezigawir.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/wenitojisifogapavejudov.pdfIn PDF document text
    • http://newgoodluckcrane.com/admin/uploadfiles/file/kalolerasibuf.pdfIn PDF document text
    • https://urologasdainys.lt/userfiles/file/dazopiminukof.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/turigem.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/rudivozuzedubofesupoxor.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/gowuvizozeg.pdfIn PDF document text
    • https://areicon.com/images/file/91539038446.pdfIn PDF document text
    • http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/fesunopudunogo.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210914104337.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/14048451274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+app+selector+on+my+androidPDF 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_off0000d2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 10888 bytes
SHA-256: 7ef28bb9feaba9402b1ad9a204f8105b7ddc56b81adee827b7d7f3f39a90917a
font_02_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 17076 bytes
SHA-256: 51f3f1f1b3c5d4eea993b673095f533e8880e713d52f3265f46f6b724dbb801f