Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a58d1f09862347…

MALICIOUS

PDF

92.0 KB Created: 2021-07-28 04:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 589755b8289b39a561e662262edce5d8 SHA-1: 47ebaa1d21bb3679da8498b0d03b82b0162e9987 SHA-256: 22a58d1f09862347145aafc275d7d8e414a54327c36d89f366c92c1772dc849b
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting. The primary attack pattern involves directing users to potentially malicious external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076b1ddf0862---57076123991.pdf In PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/48855887413.pdfIn PDF document text
    • http://iwishop.hu/file/26637065040.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/mejafifosudu.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608304ea3d491---radanegorokesinaranowejem.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/sa21e593rkh779dob0madk5ean/79194967534.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b169d97f8a5---91668676506.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/worupijasofagamadugamisa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f3d48134a---xujuwuruxujudipewum.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/tazozokobugiguz.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/41992593c09ca0840a493219bc82705d/xenizokezonulotunuv.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/35846146972.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4bc9c0e587---49241540605.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/40427bc8cf05936b4b20dcd8766adec0/42944481206.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0820aadd1---sedog.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/78720363d6a4e9bb77565ad8cbd78d3d/3638210537.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/48992709151.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/rugarozofurowunoruvi.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/4022683401.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/23541c97904091012e8a1083e32730a4/wubasimabeporakerupip.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/womitarevokaninipef.pdfIn PDF document text
    • http://stylekd.ru/files/774672335.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=naruto+shippuden+ultimate+ninja+storm+2+request+guidePDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 2868 bytes
SHA-256: 696c04cc595aff94ea7b0ad9b944d3b04474b17bb36a0007d5355e5b08a36481
font_01_sfnt_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A8 11312 bytes
SHA-256: 5a1a3ce6164492e91847c52178086406402e75614e4595a348d301bfb22aace4
font_03_sfnt_off0001328f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328F 17608 bytes
SHA-256: 6675ecabda625d0f256ccd2f7adb1e728b865bb941523079f754cd475531770e

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