Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d945c3e8ecdeaa…

MALICIOUS

PDF

59.8 KB Created: 2020-10-04 15:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 09ea3874a19dafe530ce7057ac037a89 SHA-1: d114f2be5402513443fd27d1ab8315fab90437c2 SHA-256: 87d945c3e8ecdeaa4db7c02963d95ecc7656e796b5603fb05bd6d466b001b714
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/strik?keyword=a+very+big+branch+icivics+worksheet In PDF document text
    • https://site-1036730.mozfiles.com/files/1036730/88125306495.pdfIn PDF document text
    • https://site-1041785.mozfiles.com/files/1041785/bikegotuvumakojozexozijal.pdfIn PDF document text
    • https://site-1039413.mozfiles.com/files/1039413/xugusidovisopikubogojep.pdfIn PDF document text
    • https://site-1039514.mozfiles.com/files/1039514/muvuzasuwur.pdfIn PDF document text
    • https://site-1037920.mozfiles.com/files/1037920/viwimudarulafefiboma.pdfIn PDF document text
    • http://files.jlmanzella.net/uploads/1/3/0/7/130776661/fadisuda.pdfIn PDF document text
    • http://tejut.claphands.net/uploads/1/3/2/8/132816066/4175395.pdfIn PDF document text
    • http://zowadebof.gopcffamily.com/uploads/1/3/2/7/132741064/mopeladositamato.pdfIn PDF document text
    • http://ganawepu.messydogkato.com/uploads/1/3/1/6/131636922/1676671.pdfIn PDF document text
    • http://kamez.briansartofcreation.com/uploads/1/3/1/6/131637056/vibugapimewiwurizazi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5983/4787/files/coldplay_reading_books_of_old_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/nuxirajupufobadokidajanot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/31719435372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2112/5792/files/clasificacin_de_las_cuentas_contables_por_su_naturaleza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4891/4081/files/mizuxomadokal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc2e20e-03fb-4ad6-88bc-801b3694dd82/75596874212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0133d5d1-cfbe-470b-8e84-49bea2f8961c/jowerakoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/418e3c3f-d233-4d2c-839c-41a4e4977553/33543419675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783afc43-1d30-4fe4-9aa0-3b297ace2784/kudamiferupidowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8341da87-2408-4362-b2b6-288c62a58a8a/87503486404.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A58 5264 bytes
SHA-256: 1a211b37e7eed2a17f2eda4dc3f3a969f88e70a9d5c1b39b91a99f172f8e7506
font_01_sfnt_off0000ac4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4A 11660 bytes
SHA-256: 55cdf53db2b084bb68e16aadedc3b566b8ea95f41b5ce5fa0b57b9d94b8195ec
font_02_sfnt_off0000d38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176