Malicious PDF — malware analysis report

Static analysis result for SHA-256 2572de229a8db900…

MALICIOUS

PDF

78.5 KB Created: 2021-04-04 07:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7346ffdfd8c428c33d2efcb109aeb4fc SHA-1: 20baa26a6e5d790eb22ede06e11c8f30f0b40512 SHA-256: 2572de229a8db90024f22f4057c03abd44baaa3202aecfb83251353e2eca554b
134 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The presence of multiple external URIs, including one pointing to 'dugedepap.ru/strik', suggests an attempt to redirect the user to malicious content. The ML classifier output of 0.999785 further supports the malicious classification. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or malware distribution attempt.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/strik?utm_term=star+wars+complete+vehicles PDF link annotation
    • http://berefiruzo.mygamesonline.org/child_development_psychology_journal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454671/normal_5fc6adc92ac00.pdfIn PDF document text
    • http://dotasif.iblogger.org/sword_art_online_fatal_bullet_multiplayer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424982/normal_600896196ea52.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/65769000525.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/nanasebarizowojorubejep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465701/normal_5feced184240f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_2c25a8d9b16e49eba398798c3a90d773.pdf?index=trueIn PDF document text
    • http://godusisoti.onlinewebshop.net/ruth_beechick.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_7bf1149b5bc34d089f18b9ed6934095c.pdf?index=trueIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_fb3e501eacb941359d8ce6d37bf287b4.pdf?index=trueIn PDF document text
    • http://vebadivikini.rf.gd/bt_chia_s_wifi_trn_android.pdfIn PDF document text
    • http://tizeruxabono.onlinewebshop.net/quantitative_aptitude_short_tricks.pdfIn PDF document text
    • http://xojozebu.epizy.com/96982444023.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_0fc3ab3718234af6b1ab1778c9f92adf.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_53df2f7b61a74a4da118d1c1b3ccc744.pdf?index=trueIn PDF document text
    • http://rexefobixavater.myartsonline.com/65279627396.pdfIn PDF document text
    • http://zimemotom.rf.gd/77045736168.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_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 5428 bytes
SHA-256: 0e4d8ca956f08e6a71c25d40691b164abcfa1a5b61af9f9f1b1970a2ac8d9a9b
font_01_sfnt_off000105e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E6 12168 bytes
SHA-256: 7c314f9034feb6339d5e0703db8b3b9a3b2016a099fc6785d4bf7c916d5465b0

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