Malicious PDF — malware analysis report

Static analysis result for SHA-256 65cd9a9363255075…

MALICIOUS

PDF

53.0 KB Created: 2020-10-19 00:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 6f81189d68d2fa7e14364c6543f2e362 SHA-1: 55749a6443bdb705cda0499104677a0df6834f06 SHA-256: 65cd9a9363255075847a5e702df3b16a5ce05483f09ffbbdf1c9a4c8e76c06e9
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://gettraff.ru/123?keyword=human+geography+versus+physical+geography+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f87669c83e44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8cae3144fc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8720a9430af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5f8caeff43cb2.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/ligonalobini.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/xenetin.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/vinoganazoxelikesuv.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/1/0488/4080/2469/files/51349721328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1631/3242/files/41200064910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7957/4717/files/historia_del_arte_para_principiantes_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6834/8829/files/kojubakage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/applied_behaviour_analysis_personal_statement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4114/7048/files/is-is_protocol_explained.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1819/7398/files/will_county_recorder_fees.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8884/8057/files/whisper_quest_yokai_watch_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/vetalanotule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6761/5648/files/pilekajedutexuvobadokitux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0018/4477/files/44234152210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6744/7714/files/wauconda_school_district_rating.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/2787505189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5916/2521/files/72453780813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1954/7036/files/68267296506.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_off00008301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8301 5492 bytes
SHA-256: 9887f774637aeca47e2226aa949adb804e3ec0be9ad17597cc3370433f351c57
font_01_sfnt_off0000957e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x957E 10104 bytes
SHA-256: 240315da397dfd6d3a01d336d653ba88a23937e7cdd207adf629895ecdeca5cc
font_02_sfnt_off0000b7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378