Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9f4a4ac16e50ee…

MALICIOUS

PDF

81.8 KB Created: 2021-09-07 00:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b44c0fb310397173774903910c407a42 SHA-1: bfb9beefa75a00b3f5339367ef16b970fdf9fc54 SHA-256: 1a9f4a4ac16e50ee0b8bbad97ff6d3a3796cddbac8d266579ec2037e21f4fdfc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many of which appear to be compromised or disposable hosting, suggesting a link farm for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs users to open a password-protected archive, a common tactic to bypass gateway security and deliver malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://perfectionistpaintingnj.com/ckfinder/userfiles/files/10025761044.pdf In PDF document text
    • https://mimpishiosatu.com/contents//files/63488171357.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-1/20210901044239544541.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98ef7c3aa---7147970948.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/bajozovalavufeja.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/sejudolarin.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/76949958805.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/miaoltmp0ug7hdop1hde327204/juxubaregogolikimoka.pdfIn PDF document text
    • http://abington1964.com/clients/865474/File/renekagujifudifa.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb4318eba3---7959370816.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/wuxaj.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/jumelabemamidenupaza.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160717c3c06a2a---wikazajekenatokivapede.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/pikumi.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/23197230953.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/zumoselojurukagukeruto.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082997b19d3d---moxadulinowosewa.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cfb5aceda---pinufuzojado.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/8n94b6t2jbarb42c1l2d3fe5b6/zerokazolozifuwudorerataf.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/mewufakulizepizegoposik.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/lujobedunixinezenere.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/88264226609.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/nutirajejotoronadad.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/luzomefaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=unir+documentos+pdf+macPDF link annotation
    • 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_off0000e155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 10840 bytes
SHA-256: a1656f269db1469de8cc88dc2482201fb7589ada33d576dbf70037f108c95768
font_01_sfnt_off0000fa56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA56 18036 bytes
SHA-256: 4a59c481dcd390f9ba50d36fb86deac039ede8e179ed8083559d97f977995662
font_02_sfnt_off0001285c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.