Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3feb3f6f6c83544…

MALICIOUS

PDF

72.8 KB Created: 2021-03-17 22:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 2b8736daa6b88168ae5ffd4d027ed786 SHA-1: 5a91caf5b2b0f33dc53190215c6203f99a86f50b SHA-256: d3feb3f6f6c835444863eac423a8eedc0c243065951842280bb09f6e2f83c039
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic to potentially malicious sites. The embedded URLs and the document's structure point towards an SEO-based lure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://soxebez.ru/wix?keyword=chapter+4+section+1+the+development+of+atomic+theory+answer+key PDF link annotation
    • http://gomunawuwox.22web.org/78484249245.pdfIn PDF document text
    • http://erkutungotu.com/64271006901zq5ti.pdfIn PDF document text
    • https://livogubajilu.weebly.com/uploads/1/3/4/3/134374442/puvusesus.pdfIn PDF document text
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/voginejuzog_ditogujafimazap_mubuzutaz_pewoven.pdfIn PDF document text
    • https://pasazobunev.weebly.com/uploads/1/3/4/6/134670772/pidututodizusu.pdfIn PDF document text
    • http://apeech.ru/nevojudeta586nu.pdfIn PDF document text
    • http://bubobonulu.22web.org/47473162688.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daponub.epizy.com/glaucoma_treatment_guidelines_australia.pdfIn PDF document text
    • http://pubometev.rf.gd/48475014232.pdfIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_7bd32fe2d42c4a29b31140f7f9d19dd1.pdf?index=trueIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_63c20c7334aa4dd8bbf40f99e17bf181.pdf?index=trueIn PDF document text
    • http://zosofoladi.rf.gd/online_games_mobile_android.pdfIn PDF document text
    • http://tevaninuwimo.epizy.com/97027253157.pdfIn PDF document text
    • http://vokerajud.epizy.com/hl_340_driver.pdfIn PDF document text
    • http://fadifisevak.epizy.com/33851000374.pdfIn PDF document text
    • http://lokunegop.epizy.com/what_does_voiced_and_unvoiced_mean.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_df49743430b34f77b00da30e98a01b95.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_ee587eca8ade4a26abb8bfae6b3a0de8.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAC 5756 bytes
SHA-256: 5a2489298db25b9dbe0142e01e91b930265dc025434d7220e8ab38a95a3f6a80
font_01_sfnt_off0000f147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 10608 bytes
SHA-256: 48c99393e110e8298bfdcfcde99a6a47801779e9d8f817814db39c15b986fddc

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