Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb2cc16625ed83c…

MALICIOUS

PDF

90.9 KB Created: 2021-02-21 03:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0178913dec5b1a0a4244f466618c5f25 SHA-1: 8f4d8233a1142c746641ace559e87310c1366138 SHA-256: 5bb2cc16625ed83cd24f2341d23954c9a7e491115d01302ae4bf62143cc98fdd
104 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'bologen.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains text related to urgent account issues, aligning with a social engineering lure. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

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
  • 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://bologen.ru/strik?utm_term=why+is+my+samsung+fridge+leaking+water+inside PDF link annotation
    • https://cdn.sqhk.co/lokiwejawe/Fjbhhko/19128741174.pdfIn PDF document text
    • https://cdn.sqhk.co/bovavadas/HHngiCc/aerobic_pathogenic_bacteria_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/iajgIih/43084010678.pdfIn PDF document text
    • https://cdn.sqhk.co/kigudukolon/ghg8ife/tewudipidubovesur.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/dCmiche/simple_social_icons_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/gdhhIib/princess_salon_2_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/iV1jcpf/football_coach_shirt_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/i9iggeC/hit_it_miss.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxegaxujifo/gicgfjj/26704645313.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/3gcfEih/zumulotezanewugutuxepul.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/iigexjg/50735089607.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/H2jiXhe/angry_birds_pop_blast_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxeje/hdDOjam/tobipa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/losaj.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/blame_manga_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/59325021011.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/30332002329.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/dead_island_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/50430460145.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/43876113423.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 5364 bytes
SHA-256: de500eeab66b75744b14fe542a1b901186adfab1180c86195a053c84ef8d5a30
font_01_sfnt_off00012b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B28 10664 bytes
SHA-256: 325e324de851a38365fcb51bd210443c6593c5889470a543c4b29d4a181a7e48
font_02_sfnt_off00014fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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