Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee5df7933774038…

MALICIOUS

PDF

86.1 KB Created: 2021-09-13 11:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 48a6875d4afcf705e7fddc6b09da18f9 SHA-1: 7530648b68f596a42da137ea06699019afc24142 SHA-256: 1ee5df7933774038863c6f7977ec3464a7704423fe070c6091fd1ab54d82d236
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is a link farm on disposable hosting, with one prominent URL pointing to 'undetectable android spy'. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/uplcv?utm_term=undetectable+android+spy PDF link annotation
    • https://studiopros.com/userfiles/file/In PDF document text
    • http://edu-soft.ru/site/htmlimages/file/22431521878.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/94914889278.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/36995262558.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/51110570734.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/jisuju.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/95008967655.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/votanexem.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/tovifi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efe9150137---58245797751.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/29656872691.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d9a6032c9---furimaruzajatabefidoli.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/momakadimowomej.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210906054731_jb70kl.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109041432539900.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/bofoxumajoditeti.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/3150061538.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/83879758173.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-10/1bfd0eda07a9558d0ccbe66e921b316d.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/98913249537.pdfIn PDF document text
    • http://sakem.org/userfiles/files/wasufopixurakoxiba.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/fenerejosikotatix.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/93050512320.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/42588998562.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/45138784952.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210905103338.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_off0000ea22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 18528 bytes
SHA-256: ccea32d4e69e94599f7bb1d3ba3851d758a1b7db434308d8922eae3acb9b01f1
font_01_sfnt_off00011a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 10768 bytes
SHA-256: ffd5429abddf52d97411a747d9137ebea00c641f1d7fca729973b1aa9c82ff10
font_02_sfnt_off000132b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1