Malicious PDF — malware analysis report

Static analysis result for SHA-256 70619255e968f09c…

MALICIOUS

PDF

75.9 KB Created: 2021-03-22 23:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7bede2d9f9c7b1fd6bc6b8c3d452454a SHA-1: df6bf0308881a071081a8dae63a0a3a672b539e3 SHA-256: 70619255e968f09c44e95b57c6ab55638fc668e5277623f02684a22bf365301c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple external URIs, including one pointing to 'baarspo.ru', which is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a network of disposable domains used for malicious purposes. Although no scripts were explicitly extracted, the nature of the PDF and its embedded URLs strongly suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://baarspo.ru/wix?keyword=water+cycle+questions+worksheet+answer+key PDF link annotation
    • http://buvofigutunam.22web.org/52434330591.pdfIn PDF document text
    • http://jajegizu.iblogger.org/pokemon_go_guide_book_2020.pdfIn PDF document text
    • http://constructionhouse.info/mobexuzegevuwary7t7x.pdfIn PDF document text
    • http://testvvd.xyz/soxepagolowufumakibokjo6ca.pdfIn PDF document text
    • http://gojazot.22web.org/6125629312.pdfIn PDF document text
    • http://yourbigdick.space/319973456074j3n1.pdfIn PDF document text
    • http://filanion.online/33098399735ry42u.pdfIn PDF document text
    • http://rubyshup.space/fierce_conversations_susan_scott_summarybi7wb.pdfIn PDF document text
    • http://persequen.com/8859804819n12ts.pdfIn PDF document text
    • http://lumacy.site/33824211011ggics.pdfIn PDF document text
    • http://vitalia-transports.com/13261397911ntam3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paropabaru/me_earl_and_the_dying_girl_soundtrack.pdfIn PDF document text
    • http://gowepuxajotezo.onlinewebshop.net/boundedness_theorem.pdfIn PDF document text
    • http://kolosavozogu.rf.gd/soul_plane_full_movie_free_mp4.pdfIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_20dbb4e6215f4f25964d16900aa1d71e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/jomidadaderu.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_414db867aa7944d781c7dc6c2c20a8b1.pdf?index=trueIn PDF document text
    • http://nejesezape.myartsonline.com/xexubimuw.pdfIn PDF document text
    • http://daxuwogeme.epizy.com/how_to_setup_dlink_dcs-932l.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/shades_of_blue_series_3_episode_guide.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/what_are_the_five_climate_regions_of_africa.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_6a9a85dd27c94d3784504cd99a0c1705.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/toxicwap_app_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 5284 bytes
SHA-256: 82d59b84c0d3943c5c49da369d381b3a15389e8f64dc9d6a22098585a54deff4
font_01_sfnt_off0000fca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA6 10968 bytes
SHA-256: 9e9cddbae47403348fe09b0ee5bf8f214586ca7a33b573fcc414055e1eb42f78

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