Malicious PDF — malware analysis report

Static analysis result for SHA-256 52bc6d32f48ffaee…

MALICIOUS

PDF

71.0 KB Created: 2021-09-12 04:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3f302376492d0d1e490cb3cc89861f44 SHA-1: 1e89501525c68e5a49cb7524d2935dc728272679 SHA-256: 52bc6d32f48ffaeec51b2164271b3e819ae485af6c063cc702622e2ddaffae90
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm using disposable domains and potentially QR code lures, suggesting a phishing or malware distribution scheme. The embedded URLs point to suspicious PDF files hosted on domains that appear to be part of a link farm, reinforcing the phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://incomingmakedonia.com/files/files/29442731593.pdf In PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-7/20210907175854673653.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/89424794162.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/liderise.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/befibimi.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/jiwubugoz.pdfIn PDF document text
    • http://kiemdinhcan.com/Images_upload/files/23230167579.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/wofifuma.pdfIn PDF document text
    • https://andhimazhai.com/images/files/siwatixolag.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/c436b7b60bf419a2c1adc0bab628031e/tapovaz.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/mowozemiba.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/lekitulewenufexeralebeja.pdfIn PDF document text
    • http://fgosvo.ru/files/files/nivatazob.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/duzugu.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/98824143690.pdfIn PDF document text
    • http://bgindus.com/t/tutorfirm/uploads/ck/files/32383143617.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b7c64dfc2---gulutedalexekupon.pdfIn PDF document text
    • http://thongthien.vn/upload/files/gafepojaxivutagofixelafu.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/68553918945.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210910170835_pfj8x9.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/11427098686.pdfIn PDF document text
    • http://olivetheater.com/userData/board/file/wazusaganabiwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=qr+from+image+iphonePDF 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_off0000b577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB577 10552 bytes
SHA-256: 6bb011fbd27d88d37d3439be3091399755175f41f1ba007876230f98e1e186d0
font_01_sfnt_off0000cd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56B 16212 bytes
SHA-256: 2d576bdafbb1b0ea2ccffbea84f0ec9a2802f2bfdbd58008b0ae9180155b3f6e

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