Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fcea13a2ed795b4…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 12:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8b3cb13353fd3dafffdd3611379efd4f SHA-1: d0886a864edc7a27c656ee06b4e7e41fd86f6d64 SHA-256: 7fcea13a2ed795b4aab8b8b50286bee365892c45402b5dd39d3a622f323b8701
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by multiple heuristics and a machine learning classifier as malicious. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM indicates an attempt to obscure or distribute malicious content through a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=play+half+life+2+on+android PDF link annotation
    • http://zgkimsteszew.pl/img/upload/files/85225627294.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/tevimuvozezorivapewiwuju.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd22e47ca0---vudimosejazujazetuw.pdfIn PDF document text
    • https://taumed.kz/upload/2021/09files/210913093716956924yccrd.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/22083798309.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/25044201275.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/wizujivelavolad.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/nogigapobazizadabak.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/ganexagiwixowenefepi.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/risivuguko.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/vepojigirozofalugoge.pdfIn PDF document text
    • https://spacio.hk/attachment/file/58074936022.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/181430241096.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/rajaxili.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents/files/69406915543.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/xugijilajafofuruxakutaj.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/39757524634.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/rasoselaxotitukedosevazax.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/jofozosomozuxeleg.pdfIn PDF document text
    • https://okazionche.com/files/27595677493.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/70156898597.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/99585192932.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/67907612525.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/061de3ce8e4cee337d1eb468e160f332/40951757087.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_off0000b26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB26A 14944 bytes
SHA-256: 6d69903a82d2115d900b793d668d8ca081779caf65bc388d19c5525c1f41de48
font_01_sfnt_off0000d7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF3 10420 bytes
SHA-256: 02226e6561ab4017299f88195c23976b91d0578199f25348ce0b5733328e98f1

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