Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee06957f160448ab…

MALICIOUS

PDF

71.2 KB Created: 2021-09-07 10:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2cf831c5186714bb2884f91ca22107e1 SHA-1: 943de5eec78d4d1f30b32f8ec51673ca97f6a989 SHA-256: ee06957f160448ab2756bd76fb0154d44808216eafeebaae36860eef4ba53940
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on compromised or disposable domains. The primary function appears to be directing users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=relapse+prevention+skills+worksheet PDF link annotation
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c25dd797454---39230464882.pdfIn PDF document text
    • http://xn--j1aii.su/userfiles/file/rolowadekubimiresu.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/71888500557.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a09c8186dc6827d7f95eae10f299d125/nowuwi.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/33357501329.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a88c9923f8---rubafup.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/48801740915.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711fa9c83e2---59075992325.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/18702587475.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/47444273389.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/7215550510.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/39726136978.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/21411639319.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/31357780630.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/popovuduvog.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/320e022e46e9bd1b71a1aed603ef9a54/97988486033.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b92763b094---58715155138.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/delu6pufmvselupdd6krp4qbt9/4692769546.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/49873182973.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ad83cb84d---zutivubidog.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/3dtp176kjv3hadjfd7qvrsmbl4/18834683925.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160974f590b2a7---kezejomagibamawetoboporel.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/bavelujinoxilesolowos.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/12575305401.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/zetobufiwi.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/zusesosifino.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_off0000b942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB942 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD154 14748 bytes
SHA-256: 657bac01bda9247173528a7c15073274e92ec44c813dbefa0a16d842881d71d7
font_02_sfnt_off0000f644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF644 10636 bytes
SHA-256: aba02ddf823adb33d6dc25fb9e12b3eded264fc2e8ed75e7c0e1618e47f5aa5e

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