Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cf2b29a0b68374…

MALICIOUS

PDF

72.3 KB Created: 2021-03-01 19:03:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9193bfc8a885af71c1cd79ada9653e17 SHA-1: 2b1d8941e8649f42ed5a74df265619022c24c399 SHA-256: 08cf2b29a0b683741c9ea38e9a94e27cedec14ae2c9d9fc01a1a4ab3b315c5ed
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=how+to+know+if+books+are+age+appropriate PDF link annotation
    • https://cdn.sqhk.co/bosesegivu/dFYUgfN/outlier_definition_data.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/Ffhdjbg/led_control_box_alu_13_12v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fcee1939b21e.pdfIn PDF document text
    • https://cdn.sqhk.co/zufutetuwume/hhigjdV/cnc_pilot_4290_service_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378857/normal_5ff9d46edf0be.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/54104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_601dcd6c40e86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nanisoz.epizy.com/glacier_national_park_weather_report.pdfIn PDF document text
    • http://joxepivebafugig.epizy.com/52889651470.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/75066282091.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/28061150053.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/jejitaxibutul.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/the_secret_life_of_bees_summary_chapter_4.pdfIn PDF document text
    • http://lejubegow.epizy.com/shin_chan_comedy_episode_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/is_echolalia_a_form_of_autism.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_off0000dddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDB 5292 bytes
SHA-256: 9bd5677d670b87545a4d89ad4e76e6bc9ff827549c8a43e3d9409654a6584408
font_01_sfnt_off0000f003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF003 10684 bytes
SHA-256: 82ae18e612025a8145c9167bdaa156fb1f398825e798e5d8406353541da123a8