Malicious PDF — malware analysis report

Static analysis result for SHA-256 828012c58421ff1d…

MALICIOUS

PDF

49.1 KB Created: 2020-11-08 03:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 818aa3931687a8af66d6466941a782c8 SHA-1: 4231f1360c864a3285153860305833f22873cc30 SHA-256: 828012c58421ff1d19740c99a137b09d54c73164f5e7c7be4dd021025dd3e6fc
84 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/aws?keyword=the+amazing+spiderman+apk+modded PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406169/normal_5f969730a7dee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fa54e0e54006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476002/normal_5fa72b4626324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f8ddb512ecda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5fa6f559a872f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417049/normal_5fa047e035048.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/fidefofudi/adobe_animate_full_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/rocket_surgery_made_easy_by_steve_krug.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/49490125822.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/iclr_2020_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/setting_of_the_great_gatsby.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/sumidevudumumosowa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008c40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8C40 25272 bytes
SHA-256: 56c3dac8f40c1b65fea2be1523349df4028f2827c3418cf8e6ab9644e09a67d1
font_00_sfnt_off00005606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5606 5404 bytes
SHA-256: 3a0f50a222a7e98f1ef5cd906a0ff4e13369fe64d35c205d5a488f0a39d94ad1
font_01_sfnt_off00006844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6844 10420 bytes
SHA-256: 5f45db783cef583684ef84abba0cf0d2fcb67d77a665f12a5e94c314d07f8279

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