Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c98515ab3cdc9d…

MALICIOUS

PDF

70.9 KB Created: 2020-10-17 02:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 22b9eff9995fc8edd16bc09b7b80c974 SHA-1: ab76e94f7ebe50966c9734f50b1be852e58223ca SHA-256: 98c98515ab3cdc9db70c148d0a94b1ca13d23ec5f256380ee455af2838458852
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 8

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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) or Microsoft license-boilerplate 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://ttraff.me/123?keyword=ged+social+studies+practice+test+2020+pdf In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/rusutisizisugudagepe.pdfIn PDF document text
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/fitok-xovozujaled-texel-jolekokovudamo.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/505f4b3a.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/1847100.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/koxowibasik-mijixav-puvemap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_5f8a1e188b4e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f8a1b8928638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f87f61d7ac2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f89c45628914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f87ec5e0f586.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/9c833890326677.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/nodomiw_ditikerox_sixodipigoda_tupujolapaponog.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/6407459.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7332/6242/files/xiwowufirevabefuvez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7835/6644/files/capital_punishment_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/eo2_intelligent_sports_bracelet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2016/7586/files/85228551351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9833/3091/files/manual_for_electric_smoke_hollow_30.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8335/3249/files/dragon_ball_legends_wiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5633/8341/files/58487970262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8192/7318/files/berozufale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6651/1526/files/foodie_camera_app_download_apk.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_off0000b293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB293 5456 bytes
SHA-256: 180bb7caa96fe17c35b0aedc6b2f9c285f3e7bdae84c9b3d5f045c094ff10592
font_01_sfnt_off0000c533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC533 15676 bytes
SHA-256: 492fb570fcd3735a40287576210780004c51099e392252576040d0f1e4a924b3
font_02_sfnt_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 16524 bytes
SHA-256: 2f7cf2f608fb248ebee546c24fc833c110ce32e4d329eb3dc54791442cff75cd