Malicious PDF — malware analysis report

Static analysis result for SHA-256 5558b71fd476536a…

MALICIOUS

PDF

87.4 KB Created: 2021-03-19 04:32:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d2235b5f57946848c57b93396a7ceb3 SHA-1: dd21aea7f1ff0a5f0f80fdbbf879eef9b4bb82c9 SHA-256: 5558b71fd476536aff508310e7aa0976ad2f98dd1d3523e4292f84c95ac36bbf
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. It contains numerous external links, with one prominent link pointing to a PDF file hosted on 'sudexixurijaxoz.atwebpages.com', suggesting a link farm or redirection mechanism for malware distribution. The embedded URL 'https://zajinet.ru/wix?keyword=unblocked+fps+games+online' further supports the lure of providing online games to entice users to click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=unblocked+fps+games+online
    • http://vilopeg.xyz/nfs_most_wanted_android_12jl0y.pdf
    • http://obschee.xyz/teaching_philosophy_template_doce7gj9.pdf
    • http://small-italy.space/gaxivowitomiponamoz3j4i9.pdf
    • http://trackcreditscore.info/home_economics_leaving_cert_exam_papers_answers5fc58.pdf
    • http://cccckkkkkdd.space/rug_carpet_3d_model_free_downloada2a7b.pdf
    • http://lojapidabud.mypressonline.com/collapse_of_the_bronze_age.pdf
    • http://instapriz24.site/how_to_get_rid_of_a_call_option_robinhood41mjz.pdf
    • http://lnstagramsupportlives.com/pesopufajunagegosusamwseg.pdf
    • http://arthromedro.xyz/38236622342h21ab.pdf
    • http://swiss-gear.store/pixma_mg3520_wireless_connectionk8zz8.pdf
    • http://circulshtangcalip.website/lozipu1fi2y.pdf
    • http://raxewaponoxiv.mygamesonline.org/52824511267.pdf
    • http://dejepuzalew.mygamesonline.org/dedebezuzekuveg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sudexixurijaxoz.atwebpages.com/rawiwutojapufuwej.pdf
    • https://uploads.strikinglycdn.com/files/3de5541e-709d-44aa-83aa-0d661d794f9b/76261177917.pdf
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_e5d3fdb291ee47fb93dc3438941bcb1e.pdf?index=true
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_785f613571ed436799baf37fc8bb1cf4.pdf?index=true
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_19c4ef186c4744329759ebf5f64e2f6c.pdf?index=true
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_5b261233c41f4efca208673f3aa05cb8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/776ebe8f-8dcf-480f-a1ad-5c39e286f057/2018_forester_premium.pdf
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_27ac451138de4b9e9db81641889d5041.pdf?index=true
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_d0901d19b43e4012ab53df951f7c09cb.pdf?index=true
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_70af190698a84f16bd1671a66bd3233d.pdf?index=true
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_1cea027d6e6f415aad80b370d7cb6649.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b408b56c-92aa-43a7-b0eb-0597dbec0136/2007_bmw_x3_3.0_oil_reset.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001197f.bin
c68fc8a98f805b912568e7216f3c455f9ad48cfe25d7527384af269f3f662e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1197F 5572 bytes
font_01_sfnt_off00012c6e.bin
6294005ec22951d2ff049a40713069172d3c8532a0ff4403c40ddf10ec0ce2e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6E 10484 bytes

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