Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9fe1458ed7f195…

MALICIOUS

PDF

91.0 KB Created: 2021-06-26 18:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed6bd66648bb9a38a9e567d7dc8c9646 SHA-1: ddc4e5c8a48f9b3e04fd4489a8cfcd24300496bc SHA-256: 0a9fe1458ed7f195f587d8da735288a44a07e69a82dff52ada226fbb2139ba69
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of external URIs and link farms on disposable hosting indicates an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc171e4377---45938452470.pdf
    • http://begemot-rus.com/uploadfiles/file/2021061013035673499.pdf
    • https://profix.fr/ckfinder/userfiles/files/totixexawurifapirufozurar.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a6770f8cf---51562981582.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607f69865e12b---50132686270.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3c950fb23b71fc1b93471dac90a3f7a8/11016444919.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160768d908c4d1---60880426234.pdf
    • https://pfhotel.gr/ckfinder/userfiles/files/zipezagofal.pdf
    • https://n-v-v.dk/userfiles/file/28343304111.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/qkk5s9dj0eqpre31np1j4bsrk1/fanebedisativadap.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/80480da724d84ce40b14b4cc74dc189f/ritafadomaduzow.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/987b8ac694aa7ca73711d7b577d68ea1/jawekilu.pdf
    • https://lepjunk12.hu/uploads/files/75812466101.pdf
    • http://hum-lucknow.org/test/fckeditor/file/tebalufif.pdf
    • https://paperland.bg/uploads/file/ligubejarenajafukaku.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e71bb06c7---zesefalabusonazokumitoj.pdf
    • http://manavpublicschool.org/manav/userfiles/file/66010181115.pdf
    • https://fablab808.com/nbloom/fckuploads/file/ruxamu.pdf
    • https://grandplaza.bg/uploads/assets/file/nilidujarazurukejuk.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/23543296025.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/cjdkrdfp7ac0be1lh1eun42vib/48491957130.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d102bda000---jowuvenalofodul.pdf
    • http://scuderieverdina.it/scuderia/userfiles/file/41642094032.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=baby+cry+different+types
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe62.bin
755de105990fa4a7dfdacbb0ff75c4d89eb81b8242a8b6b99ed24120d8a54186
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 17604 bytes
font_01_sfnt_off00012c87.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 16792 bytes
font_02_sfnt_off0001449e.bin
19fda08cde2feb79003a9f0f4958101c9dab361868b39c21b979849fb41059d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1449E 10756 bytes