Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a8ef7b74778932…

MALICIOUS

PDF

41.8 KB Created: 2020-11-01 14:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 3ca6ea943da4774f4fb54fd1bb0e39a6 SHA-1: aa6c1caa0571a3a4efba6ca956547e099ad48a22 SHA-256: d2a8ef7b747789326ea7f5715acf379d9285520379013519ead90972b2e97d51
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://ttraff.link/pify?keyword=post+oak+savannah In PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/molupi.pdfIn PDF document text
    • https://wusaveverafojiz.weebly.com/uploads/1/3/4/3/134338410/xebosegifarotep.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/gitesujolute-lodegesopi-limewibafa.pdfIn PDF document text
    • https://bolififona.weebly.com/uploads/1/3/4/3/134316640/vuloka.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sezebe.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/gazavozatadarope.pdfIn PDF document text
    • https://sofakixejiz.weebly.com/uploads/1/3/4/2/134265497/toparemoto-webegosutusawu-sibumelamumoj-zumekilapi.pdfIn PDF document text
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/7974714.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95608803-7314-432a-a9bf-168326f20ddf/guvefapo.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/biblia_catolica_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/sierra_gameking_.243_load_data.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/kosovukuras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213e3120-e3e0-4e9c-b9c8-bc2658b88232/casio_gzone_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/jaiib_accounting_and_finance_solved_papers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222c5aec-4762-4b7a-b754-defe7726d8a1/64864858479.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_off00006704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6704 4768 bytes
SHA-256: 9b702169079c8d3e32b12d12eeb01e6db779b419cbb8447d746854c35f93edb6
font_01_sfnt_off00007743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7743 10596 bytes
SHA-256: de58a4ba69b6239976c2f577053618ea1bedb193ebf7eb29fb480b3236e74a29

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