Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd98c8f2aef01d68…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 05:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: dbb13fa5d07bc344ce198d9098bd73bc SHA-1: d2f2545e05576d68ecea2fc89ff1819be8505a5a SHA-256: fd98c8f2aef01d6841a9824b55c4118d8e32a7f54ff21c7207c827e1ac2f6fb8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of an SEO link farm, suggesting a deceptive purpose. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/award?keyword=amaranthus+viridis+medicinal+uses+pdf PDF link annotation
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/xuvek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387240/normal_5fed006a37c9b.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/ic8igBn/37480324801.pdfIn PDF document text
    • https://cdn.sqhk.co/nupumusu/k9jbgia/86352268093.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367017/normal_5fec27675bd20.pdfIn PDF document text
    • https://bewodopogogubak.weebly.com/uploads/1/3/4/8/134886142/8221328.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/NwDjhi0/piano_tiles_online_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_601f5a0598d48.pdfIn PDF document text
    • https://tabutepapuwup.weebly.com/uploads/1/3/0/7/130740025/7252460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_602828395a75e.pdfIn PDF document text
    • https://rarasuxa.weebly.com/uploads/1/3/1/3/131398432/mujigakuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401538/normal_5fedd6203e87c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://s3.amazonaws.com/zewimu/adobe_indesign_cc_2015_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/93763029448.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/free_math_worksheets_multiplication_and_division.pdfIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_448dbbe0c8a1484b840345f14ac97860.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/95121537273.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/76072335557.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/lavefoselivolilof.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_743abe3120e544f39353bb902cb695fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/zejok.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://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C9 5444 bytes
SHA-256: b36bb637640554f426ec896acab59bd6a63006bfb8769310c2ee84bf2bb4c1b2
font_01_sfnt_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 3104 bytes
SHA-256: b9677cb59a74a2ea8145b86262fed56c8413ec5a19643e265851d52469caa29d
font_02_sfnt_off0001063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 10864 bytes
SHA-256: 2ba630ccc88fa2fdbe37224158e87c47619edf6f4e7fb44447719a996c3ab5b4

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