Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfbc295793546f9…

MALICIOUS

PDF

48.5 KB Created: 2020-10-26 05:02:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2553c24ac348c5449950e488fe7bb04c SHA-1: 2dd549b82fe5ea77251cb9d9cbca8f68608d6220 SHA-256: 8cfbc295793546f9f866cad5d7fddd496f9d6ae93370ca1a530e98f6cccc642c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://ttraff.me/123?keyword=sonic+dash+hack+version+apk+download In PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/7c2eb3c.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/2500895.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/bba0b.pdfIn PDF document text
    • https://gesurori.weebly.com/uploads/1/3/4/3/134353915/lusotawiwuluvake.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/jifixatunos.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/lefalosupu_dujiseduta.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/fa6d8f.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/9937558.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/kuratimoja.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/pemawopo-ropiwofe-riburel.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/eea92587.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off00007321.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off00007321.bin)
    • http://www.fontrix.comhttp://www.nhncorp.comIn extracted file (font_03_sfnt_off0000aa25.bin)
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/zotikin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7035/7149/files/october_sky_movie_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/mathematical_physics_boas.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/enuresis_and_encopresis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5043/4211/files/wps_wpa_tester_premium_apk_free_download_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/fonelab_for_android_1.2.16_registration_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2056/5156/files/multimedia_text_set_google_docs.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 extracted file (font_01_sfnt_off00007321.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000657f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 3860 bytes
SHA-256: 737893baa46e3feeb408f77f763195ec8fed6178a1ffc8cf653f31c752dc0d97
font_01_sfnt_off00007321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 5480 bytes
SHA-256: 4a1086f565268097a17104cead3c18597812f51adc99d8456b9cf73cf1eedcaf
font_02_sfnt_off000085c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C5 10592 bytes
SHA-256: 14907ede2b04545913a5aec7ee3cb13b988e158bddc6ffcc3430aad68f799792
font_03_sfnt_off0000aa25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA25 2448 bytes
SHA-256: afebc62346bf7766618c77575d1f9b689299573154800003405835b11f7a1556