Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38e5fc9ec459329…

MALICIOUS

PDF

71.8 KB Created: 2021-06-21 17:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ab74af338d8e02d4ade348fd179932e0 SHA-1: e9d6f63713f80020da645ba1d6aece1e7d5664bd SHA-256: e38e5fc9ec45932918a70ed621dba026615ce74037f26a70213d64719a9012fc
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_CLICKFIX' heuristic suggests the document employs social engineering to trick users into running commands, likely to download and execute a second-stage payload from one of the numerous embedded URLs. The document body is heavily obfuscated and unreadable, but the presence of multiple links to potentially compromised WordPress sites and disposable hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://philabc.ru/uplcv?utm_term=minecraft+mod+randomizer PDF link annotation
    • http://157.230.241.115/image/upload/File/1498853372.pdfPDF link annotation
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/v87c43pjs9277oh07rp91pp3s4/bovef.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e87e2857e---kirawixikonakomij.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2a091c6cc36be08668922c23de9db45f/patajap.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073606b46bf4---nerodonorajidalekub.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75493afe27---26771229133.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/74413254738.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/wufirez.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/7d116f1288c7c01d167d5f1a38e01a60/beweje.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607496a25f95d---kumofizaf.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/32be8de11c432890d5bed2a587e89dcb/jabagedabuwofibo.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/bamogelenibuverivetaneva.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88a54c8ea1---kutemolo.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/99777473347.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/8308693857a7ef435033a5a0b43d47c8/losozuliluguxawanefit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000c43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43E 5012 bytes
SHA-256: b94d0671080cdca8d4eab08b5087ff30dbf03517a81ed324fbbe4be865e6c286
font_01_sfnt_off0000d549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD549 11228 bytes
SHA-256: bdd077c96f8bf2109e271fc9962b402ae1eb5ba65585a9504cf8af859d376f66
font_02_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 16064 bytes
SHA-256: 9b78b915eb75ef0aea6965a6113565ca1bcac7735c766488ce9f12ff332a71b4

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