Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48311e5dfd2e8e0…

MALICIOUS

PDF

72.9 KB Created: 2021-02-21 16:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b309c20403ccbde95fd655bb8a729d50 SHA-1: 354e1456f0cd0d684d165da0ee5568c5eb7765bc SHA-256: a48311e5dfd2e8e0102be311e22282ed55cba21d89cf8296d7ba363cf45b73a8
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://seumenha.ru/wix?keyword=thea+research+guide PDF link annotation
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/zarinim.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/GghAIgf/cable_size_calculation_formula_excel.pdfIn PDF document text
    • http://roflan.site/baishe_srabon_full_movie_onlinex60vt.pdfIn PDF document text
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/bejovela.pdfIn PDF document text
    • https://vubupegizisave.weebly.com/uploads/1/3/5/3/135315261/7466275.pdfIn PDF document text
    • https://kobivepetere.weebly.com/uploads/1/3/1/8/131871499/1473750.pdfIn PDF document text
    • http://ladyso.ru/1161721761jef8n.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/v7haZAc/pba_league_rosters.pdfIn PDF document text
    • https://vodesaladamaju.weebly.com/uploads/1/3/5/2/135298616/7173110.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/6453823.pdfIn PDF document text
    • https://pipefedib.weebly.com/uploads/1/3/1/3/131383483/4eaa6ab5cbbf9.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/muvarelo/armadillo_willy_s_nutritional_information_salad.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/mafaxediwasijilo.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/android_10_launcher_gestures.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/74117052116.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/39066941684.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_off0000e20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20E 5116 bytes
SHA-256: 207d5a8e98648198aef538711d129430e6db860dd259cdb23634cb5ded900746
font_01_sfnt_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 10276 bytes
SHA-256: 90b995fbde00035aca0538443b2a72d23c744e036f0d150712c79e69722d66d9