Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8311af85b79f02…

MALICIOUS

PDF

45.7 KB Created: 2020-10-14 22:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e3d5b1135f6d348f8283c30c60332aed SHA-1: 4b0fa94efa72b56a07ea2cbc0738e398feb0cb8a SHA-256: 5c8311af85b79f02242a7ea9e8cf3088658d9c28ac76c635ae93729494553b24
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirector infrastructure. The document body explicitly mentions 'Super Mario for Android APK download' and includes a URL that leads to malicious redirector infrastructure, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?keyword=super+mario+for+android+apk+download In PDF document text
    • https://site-1037114.mozfiles.com/files/1037114/63156749358.pdfIn PDF document text
    • https://site-1042665.mozfiles.com/files/1042665/dipesepoj.pdfIn PDF document text
    • https://site-1036924.mozfiles.com/files/1036924/45953300467.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/jibigamefomoni.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/e27909d0be.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/6ec94.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.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://cdn.shopify.com/s/files/1/0492/3080/7196/files/opus_file_extension_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7747/4206/files/88908899150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7196/2777/files/11092399106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/for_better_or_worse_season_6_episode_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0275/1905/files/are_you_ready_for_precalculus_prerequisite_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f1c657-e932-47cc-bc41-64eaf97700bd/nepekisozanukanixol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d74ffa-6915-422a-b66b-2c9cf58bbaa9/fifiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a33cb56e-5270-4a87-a25a-ee2e9aa7612f/46286129494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ffbf92-1012-4d88-883a-8d9fba6297b4/vugob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdf27bf-bad8-470f-b473-de6fb32dd2af/63022885134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3563/7922/files/rukifutesalomogoxetawiwar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6208/3232/files/spring_snow_yukio_mishima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1260/3042/files/gofamuxura.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_off00006783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6783 5068 bytes
SHA-256: 89db1604e8096915c8d1e2b35cd5de02cda825f1aad74bf742ce054fff70e2b2
font_01_sfnt_off000078ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AE 10024 bytes
SHA-256: e7ec87edd6249fbb2e15c63be14182aaec62420668ed03c0c1526acef7c89b99
font_02_sfnt_off00009aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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