Malicious PDF — malware analysis report

Static analysis result for SHA-256 0325a383650b3ab5…

MALICIOUS

PDF

71.4 KB Created: 2021-02-11 15:19:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 87e8ae696276a7552171725b3e5b7221 SHA-1: 429244e4e2b3e7fc57c1e88a5dcccc960eb96f7b SHA-256: 0325a383650b3ab55e7146b98c10cb317d475864e45c1485918a6a20de573f4c
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/aws?utm_term=fingerprint+worksheet+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_601ffd8f44da7.pdfIn PDF document text
    • https://terunutu.weebly.com/uploads/1/3/5/3/135319236/1a53946eb7.pdfIn PDF document text
    • http://websporizlehd.com/free_lagu_karaoke_mp4qmdf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383340/normal_5fde499463700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_6024cc1f6498a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5ff9d8049ae27.pdfIn PDF document text
    • http://teasmall.space/zeforesiselujadawuvovv9kzt.pdfIn PDF document text
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/topiv-wesepewaxutef-rudax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449422/normal_5fc7e64767ca3.pdfIn PDF document text
    • https://nebunabimumebu.weebly.com/uploads/1/3/4/4/134480995/vafigeki-bovalatotopiduw.pdfIn PDF document text
    • http://emirofficialzm.com/fibimifujevadakadanude1zyrt.pdfIn PDF document text
    • http://5coupon.info/new_pokemon_android_game_freeotdit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366401/normal_5fde923b1a86b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448719/normal_5ff4c82fb507d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_601caf2cb0490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/arjun_patiala_all_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/aha_guidelines_atrial_fibrillation.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/what_is_basophils_in_blood_test_report.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_off0000dae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE8 5260 bytes
SHA-256: 7ba38aa4b184c5f3e22aa08a03760c799a3dac634241ed56857c2f10128542f9
font_01_sfnt_off0000eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 10504 bytes
SHA-256: 22eea35c75f8933760a5d488cfa65982ec086cd7e1abfcf5a0ae6d8ac00c0fb6