Malicious PDF — malware analysis report

Static analysis result for SHA-256 9836e2e09a4e2e66…

MALICIOUS

PDF

77.8 KB Created: 2021-02-10 21:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 84a0352e3e2aa02fa301cbc5a085a21a SHA-1: 3447fd7cb3a4ab77f577807df3c480a9f0dc5ea9 SHA-256: 9836e2e09a4e2e6651ded11312057bec12b461cf038abc16218125bf6ca980d0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/aws?utm_term=franchising+books+pdf PDF link annotation
    • https://cdn.sqhk.co/wubunepan/sBSidje/20423609084.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/jfEhdff/fujitipobaresexajuj.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/hhOZUkw/knife_sharpener_electric.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/CzjbSja/at_t_mobile_transfer_app_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_6017a82570b96.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/Eif1Rjc/3712582797.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/ziarCBW/wewusiratimuxo.pdfIn PDF document text
    • https://lupemofuxuxutuj.weebly.com/uploads/1/3/1/3/131383332/72b1c5.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/iTRxibQ/livafikabamebepegazub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_60159f868b7a6.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/jghgcgj/12212371176.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379219/normal_5fe5453943b0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418401/normal_5fe0fbea18507.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japefafe.epizy.com/female_flat_stomach_workout_app.pdfIn PDF document text
    • http://radujexoxetapil.epizy.com/barbie_games_free_and_play.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C8 5544 bytes
SHA-256: cd18f95b8ab213c993b39b4bca962cabe9c366068dbd0095300093fd806786db
font_01_sfnt_off00010498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10498 10684 bytes
SHA-256: cfbb5e42fa6f8e5c9d7768ca240fc75b16c53545a1bab01d7e0f35716e3c28a8