Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa031419f523ac9a…

MALICIOUS

PDF

80.0 KB Created: 2021-06-25 23:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: a2847aafb72ebbb40cbc3f62abdab942 SHA-1: bce95f390422302ed8e61eeeeed0019051cb40f4 SHA-256: aa031419f523ac9a2b316002bd0fe09d557907a1a562ab2ec9da511782b05b80
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links are likely intended to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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
  • 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
  • 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.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2373b88e8---pukoxa.pdf In PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/0c90bff8586719bb1dc02cfacf5a06a2/bimede.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/59a8d68461b1f3a9fe2e1345838b2554/zaxebepuze.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbbe4f24c0---61317794164.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210604111127.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/tejubomuzamojamo.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/cf3ed2f914869497edcb4df58c75c6dc/6524958886.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/mifoselitenefupeto.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ec8cda8db---kaxeroge.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/235af5fdbb664da39536de669bc887f6/pefowaxalir.pdfIn PDF document text
    • http://kfbi.ru/content/file/maresenobaluzigajopukal.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/303468ed22e46163796ad403e63036c9/13677485847.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/9b9o0fo5bu4ldlmhrccckrt03v/liwagovagisoto.pdfIn PDF document text
    • http://coumert.com/images/file/47601938194.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/9ad09bba17aa5c8793bfba33ff79ec38/50557646420.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/7d25svthjlhgtl0d3j0h4ucbtq/xafalitabewo.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/51a1e0d81d23712ae5596ae6ade67a7e/kejuroz.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/saxosizufa.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160acdf69b4e62---sabugimegepiramerokusu.pdfPDF link annotation
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746271ed9af---7993282140.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160829edb43dc5---bizexozuge.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/df521c84d0eb13c68e779f22b465c4f8/57526221312.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/zigukukefipawa.pdfIn PDF document text
    • http://bjjiffy.com/upload/73840078781.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=blue+and+tan+dachshund+for+salePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D2 10636 bytes
SHA-256: b8ba82db0916fe228ae39b8c6eeb8aecb9d8575bb4910872e59b92bcf0f02b8b
font_01_sfnt_off0001191f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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