Malicious PDF — malware analysis report

Static analysis result for SHA-256 b879d2c96e82c9b4…

MALICIOUS

PDF

166.5 KB Created: 2020-11-02 03:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cb0e201035da0b06ee3fba1f24b17156 SHA-1: 28461726b534a09332ccc869976a4f7287383dc7 SHA-256: b879d2c96e82c9b4cbec5048305bcde1ddbe89bc83065a00c28c31200b8dc7c6
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link that points to a URL designed to deliver a payload, disguised as a game download. The presence of a 'download button' lure and a 'password archive' lure further suggests a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=real+steel+hd+apk+full+game In PDF document text
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/zumewabevowo-zedinizutelimeb.pdfIn PDF document text
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/pujujabopejewud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/517aafc0-d946-4953-a9a8-08921d0e7ad7/luzadisuwemibiduwexuk.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/wuvumeladi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3097/3080/files/watch_catching_fire_online_123movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4594/0128/files/kefawanil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8194/9875/files/type_s_backup_camera_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae76e0a-37cb-4888-b614-bfc9d475f18b/pejiwob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6038/6709/files/wsprzdne_geograficzne_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a13085-89e5-4ffc-8599-27a2d8aefc14/gupomogamiwetogixozig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3118/6589/files/sinoninixetagiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8468c3b-09f3-4d92-867c-f97f6f43f35f/mxl_4000_shockmount.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/50934437919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55247bfa-8674-4b1b-ba15-b424645da11c/jipujeniriw.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/85707165349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4475/1528/files/kawuririv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000238c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x238C2 5432 bytes
SHA-256: f9c416815748a0a86320cee5dedab8ad5b7e63576ac03d945109b9a2907067c3
font_01_sfnt_off00024b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24B1F 12800 bytes
SHA-256: 0386058b33ee2586ca47e7744085c09557d90bfae1d1e65b164381ab94ee6d47
font_02_sfnt_off0002764e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2764E 16372 bytes
SHA-256: 9dd4ccf588beee524829d6fb52bfef679ffb47dd92887c5864a2c659abdcc4ac

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