Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f578d6c3fe6b535…

MALICIOUS

PDF

81.1 KB Created: 2021-09-07 02:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eae1aac57de9e152f9dcfc2a9f6f177d SHA-1: 85dafc6af6111cf3833e07868fb82722ba385553 SHA-256: 4f578d6c3fe6b535d366d165c782156127287192951f7933315c3d84c73bb7b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary URL, https://allytemp.ru/uplcv?utm_term=investment+management+strategies+pdf, suggests a phishing lure related to investment management strategies. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=investment+management+strategies+pdf PDF link annotation
    • http://www.tamtrebinhminh.com/public/files/3619256262.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/kutopefelovufedejiri.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ae41791fc969424a2d7737d526912a9b/kagixasupodirevotevof.pdfIn PDF document text
    • https://irantruck.ir/data/file/70505639516.pdfIn PDF document text
    • http://theofficeplus.com/userfiles/file/jirevom.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/a8ba6aca6d2c07998d7bf7f9e4e7a7e9/malifefaviromiru.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/836819dc3f06cdb10665420b2c9f918b/duvekanafokidi.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5a507e03e---rurazi.pdfIn PDF document text
    • http://charontrade.hu/data/file/kokutojaxiwarutapuwixalif.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/d827fbc00237d20bf1ee2f9d70192c86/79510310572.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/cou53bulq5qfp7m4vfcokgdtrr/fupisuvuzumepi.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/99481833949.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d445bc03e192aa3f21856649e6463f1f/62535462436.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/69a923110d2d73bfb5df2d0f623fa53d/xerepubefaduxupos.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/21973525008.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/dewatavovevifepira.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/b78e4a57f7afae484b2d900c424336bb/51696644786.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/35806204718.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b4340c17379---95595152741.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/kqc55lnud56g21flssaq49fvh1/matosotarubopesolo.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb599181f7---rikurugonir.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_off0000d775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD775 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 18128 bytes
SHA-256: 42a3a1a5756d7daf73de4cffa8b3543565ae8f70ad3745d944b691f3cf522bca
font_02_sfnt_off00011ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA1 10692 bytes
SHA-256: f47f4f47224a0fca002d0901d20001c3f69a17382e011105f89b228489290be2

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