Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26e48f8f622f79d…

MALICIOUS

PDF

94.1 KB Created: 2021-07-29 09:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3392a5a441f521f602c314bc8e154c8e SHA-1: 7b69fb7bb37d5961b89f9fe72458b5e221c74a65 SHA-256: d26e48f8f622f79d199754a74f8504e1f0ee620b9a4d4221fc053eda46a5b330
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://laborke.ru/uplcv?utm_term=jp2launcher.exe+high+cpu
    • http://obrienbuilders.com/userfiles/file/32442008874.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ei5spc22h31ejkavf3jh2kub3v/52125330862.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607153f0dd310---86131373917.pdf
    • http://newfieldclassof1982.com/clients/6/69/69e49ffade321d977af769e13f9f004b/File/67938316333.pdf
    • http://premium-h.info/files/files/44444703887.pdf
    • http://bbmeti.it/userfiles/files/58480783993.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/xasudagodimajutusoseb.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b13c0f038f8---mikipivazemijapot.pdf
    • http://schokozentrale.de/idata/13303577800.pdf
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210726_4E7437681B2A669C.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/21402432147.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e94f74009---69568912376.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8cd4d37b---51453228610.pdf
    • http://fmi.lu/userfiles/files/84781114544.pdf
    • http://oio.cn/uploadfiles/files/91322907984.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/d5ab51f6c995d6762b8794f65d38d22d/xagizezajobarepinabogef.pdf
    • http://asbufestival.com/uploads/FCK_files/file/12353593626.pdf
    • http://jkohut.pl/file/11413623788.pdf
    • http://webinaris.org/ckfinder/userfiles/publics/files/tugefazujuximoz.pdf
    • https://cambodiadriverservice.com/userfiles/file/gedujesapiza.pdf
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/26016656205.pdf
    • https://foodvellythailand.com/upload/files/xabekojasejadupu.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cecc56413---65214226186.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a144a0910b6cc5625d988728b969fc9e/66580109918.pdf
    • https://menu2uplus.com/images/file/12520505551.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 16792 bytes
font_01_sfnt_off0001221c.bin
7778885acce56f27af6c92ac013370b96f297edd37e4ed1c59872866130b068f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1221C 18184 bytes
font_02_sfnt_off00015257.bin
1d4bb761e65e5610ba24acf4ee81a7c018381116ad7c015dd2a0292beeb81be1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15257 10644 bytes