Malicious PDF — malware analysis report

Static analysis result for SHA-256 8575d08063133e15…

MALICIOUS

PDF

86.3 KB Created: 2021-03-23 02:22:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0d5c0ab13aae3b7620be72b2667b60d SHA-1: 6ecfadb6772ed5a1b54e40f867cd4009d663b1c5 SHA-256: 8575d08063133e15f0d24f839e59d6160359364f3b58c1a50ece699959e867a4
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO abuse tactic. One of the primary external links points to a suspicious domain, likely intended to host malicious content or redirect to a phishing site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=sharp+xe-a102+operation+manual
    • https://gisunada.weebly.com/uploads/1/3/1/4/131409009/8777129.pdf
    • http://graatorama.space/3663548208z8zj9.pdf
    • http://wejnpowk.space/the_war_of_art_steven_pressfield_goodreads201kf.pdf
    • https://vesemidibokopiz.weebly.com/uploads/1/3/4/8/134869856/xupavas.pdf
    • https://cdn.sqhk.co/safubuguva/njfnjjm/tefev.pdf
    • https://cdn.sqhk.co/tuledapozato/jiaaMel/rawazunamexirebobi.pdf
    • https://wuwenesugujiku.weebly.com/uploads/1/3/0/7/130739695/2490188.pdf
    • https://cdn.sqhk.co/kubepugemaki/uiaBX0e/all_in_one_social_media_app_android.pdf
    • https://lekinowi.weebly.com/uploads/1/3/4/4/134476644/4dc0c2849239e6.pdf
    • https://radamokugek.weebly.com/uploads/1/3/2/6/132696621/fugelekoku-ronojitupi-lerunuda-xinemerekebejuk.pdf
    • https://cdn.sqhk.co/satukevaguka/jhjbQoD/sonopekume.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/090f13c5-dcb1-49c0-80b4-2e8e43d23a17/64826024494.pdf
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_ad05c2ce2a89405fbde3063797dcfd43.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f2cdf549-ac95-483e-9a85-02b3c0277d54/office_365_end_user_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/d3ba9bb8-289f-4ba5-975d-a0981d47c5d6/6._encyclopedia_of_chart_patterns_by_thomas_bulkowski.pdf
    • https://uploads.strikinglycdn.com/files/5170712b-0f8b-4432-977e-b2dd8616cf4a/nukizewuzumudumada.pdf
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_fa3620f34e2643dcb6624f83292fcec4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/15e7063d-60c7-467d-af48-9d4af3163c5e/piwiwapotemaweb.pdf
    • https://uploads.strikinglycdn.com/files/681ecb64-73f8-47ef-bbd8-8720b039e683/jofesekuwamunubaxakoxuxip.pdf
    • https://uploads.strikinglycdn.com/files/a282e67a-4ecf-4b39-aa7c-fd255299c387/774496052.pdf
    • https://uploads.strikinglycdn.com/files/412e689c-796f-4d1a-9baf-080d7afc52b9/why_wont_my_washer_spin_fast.pdf
    • https://uploads.strikinglycdn.com/files/908c00ae-43f0-4597-bce7-7dc85d750ccd/9768070786.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecff.bin
7b739a6126c2378ae257f0d6ccd2917add42c0f010d8bbb397836d1bff25ef16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 5292 bytes
font_01_sfnt_off0000fed9.bin
1d1d8ba045a24aa2b4163c33821820cf92c3917c38f51312b6ca62401f7b820e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED9 11756 bytes
font_02_sfnt_off0001272a.bin
daf1883492d64eb2830cc8eabcc582def4ae9ce6a05fcd400af63bb13c14892d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1272A 16076 bytes
font_03_sfnt_off00013bd1.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD1 4324 bytes

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