Malicious PDF — malware analysis report

Static analysis result for SHA-256 89aa8971f8e03ccc…

MALICIOUS

PDF

73.9 KB Created: 2021-08-29 15:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 57dc027672f681962517abcf419d16d0 SHA-1: 6df1e9dc1c02e19945bf311c342a9a624ec0e129 SHA-256: 89aa8971f8e03ccc8d09baddabdf420dfbc64904cf31e119de649fa1ed777f0c
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://oniceh.ru/uplcv?utm_term=northrup+falls+tennessee PDF link annotation
    • https://lederstuhlshop.de/ckfinder/userfiles/files/xulemixisubujodulo.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f784275db1---gifugavoxefojitukijivet.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/nanurofemaj.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/5037377064.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/fa43399a2f7e07da14a240195491f5fe/sexuripevapubenomuk.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/nuwijuvoxiropoden.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/97jlr1qggvnatuc9fcqgnbqmfl/lugil.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/zapidawozisasajotasebufak.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/9f544a9c7c5bb63510c6f1d57d01c980/13587907107.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/xerofeg.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ppsh65aab82mg7di9nqkl6d2fq/bopasigilobo.pdfIn PDF document text
    • http://samtekelektrik.com/files/11069432299.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/zudetugiloged.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b498640d498---24313112200.pdfIn PDF document text
    • https://gangnampools.com/contents/files/51901624405.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/56739400933.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/u1s3o6bo97krav39sbe0rdr04t/texubiwuta.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/53393129150.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160fab06912a35---muwakedapaj.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/ee13aae1d00bbe692cb3946195f2d119/87746479826.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/rajiduloka.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/jfkb4j0ek36jmin5nnq75mnt0b/2897966009.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/6e5a13b1a50c22f77ca4277b942ff6aa/zevizebeluzix.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/4e905c374d035560e67eb87607c6aede/75615302780.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_off0000be4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4E 16376 bytes
SHA-256: c2fb8542b612e2ea32c4266136f2070d339b1877099d5faf5652b322c250ec1a
font_01_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 10440 bytes
SHA-256: 8447db96235d5601e0d45ff4b5c9c219f6e40c72310b18d06326cdac59fae104
font_02_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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