Malicious PDF — malware analysis report

Static analysis result for SHA-256 46626377fd1cbfec…

MALICIOUS

PDF

78.6 KB Created: 2021-07-30 10:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 546526e764bdb10be27eb70aec512c17 SHA-1: c7fc704e45ba4b5a7782efbe36d2e4ba6d60a57b SHA-256: 46626377fd1cbfecb2cd5510a1e0f023e5dfd35810a9f1d347c3e44366576770
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits malicious characteristics, including links to compromised WordPress sites and potentially disposable hosting, which are likely used to serve a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farms suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://crysiq.ru/uplcv?utm_term=math+kangaroo+usa+2016+answers PDF link annotation
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1cf3be122---lidofelumeviloso.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/9ece6ad7defd4cee6befa11ac92980eb/36691639292.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/juvosedijavafegebuvokabif.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c446d321fad---8080104691.pdfIn PDF document text
    • http://austintownfitch1980.com/clients/879833/File/jebifizosu.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/9181451856.pdfIn PDF document text
    • https://buyafranchise.org/files/files/xizorepegegapenomamusi.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160780954787ae---lelewujatogezeruwezow.pdfIn PDF document text
    • http://developmentassociationofnagaland.org/nbloom/fckuploads/file/finosasapi.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/b42585401f300b8986b135ce941701ff/12435961583.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/wopazomijetigoxu.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160776ff0461d7---pajulamir.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/91879202859.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608897269203d---povesosapinadupozifutuwa.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/c8gou2cd3fuuekkapv4drdvvb0/38779569128.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b53569a5ad7---45626744855.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb19cccbf---tenaboxagugiguzizufugu.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/sikewawuvafevifip.pdfIn PDF document text
    • http://dzbnf.com/upload/file///97702212470.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/86273426063.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/misajivatelok.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/xezusogubesabonugusasopo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 10980 bytes
SHA-256: 00417df027c6c8395690eefac9518f0645ffbf7211b4e9a1907e3892c3898288
font_02_sfnt_off00010478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 15868 bytes
SHA-256: 8880c0e7f52a1b9100344726dd20d1a685488b464cb480fc8473f874f6740201

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