Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc980d8da35ca4db…

MALICIOUS

PDF

80.7 KB Created: 2021-09-10 01:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 568ffaf8e531956017d0a9d450f4c118 SHA-1: eeb5d3a29e42d3d3b8f2c0837901e87841f1eaf3 SHA-256: bc980d8da35ca4db9c58cf7c460ef7f5662e38f74ae5383eae23c30a811e11e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to unknown domains, and one heuristic specifically identifies it as a link farm on disposable hosting. This suggests the document is designed to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://saothienemb.com/uploads/images/files/63334689605.pdf In PDF document text
    • http://dachastyle.com/userfiles/file/51915190547.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/potugagesimamapifovelana.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/vikobipoxapexoruxebug.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/fikufowosamubisege.pdfIn PDF document text
    • http://retailcop.ca/files/fosuxidul.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/negebizozifogosepuzetigeb.pdfIn PDF document text
    • http://8njl.com/userfiles/files/39621162553.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/47528464655.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/51250548655.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210909_0F64A6BDBCE94C0F.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/sufevumamawuxukoj.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/30384497599.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/49320642276.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/6931096366.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/pibakewa.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/11005805603.pdfIn PDF document text
    • http://robbes.nl/media/files/bifulix.pdfIn PDF document text
    • http://artio.pl/files/files/merogepubevefulijutabivu.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/98920942000.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/663f084f07f80970ddb96e73ac7f52a0/63307383696.pdfIn PDF document text
    • https://rubfila.in/files/file/sexazuxerixunovewif.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/15092622141.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/99729217679.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/4403431436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+save+a+pdf+as+a+web+linkPDF link annotation
    • 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_off0000d2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E6 10768 bytes
SHA-256: 54629d6c0fcc30eb535727c2caefd083ac18f46be75760169a117a41df0b6efd
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 18724 bytes
SHA-256: 7c1f3f32dc70c5a5011466fdfcb0ad13f61259ae839e75b39a3e4a15d7752c65
font_02_sfnt_off00011cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1