Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37dd11023057551…

MALICIOUS

PDF

46.3 KB Created: 2020-10-29 00:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 4d6f66b6f894ef6d8162e568f66a446c SHA-1: 619d3f029f6fd88b2e6dae6337418824dee2dfea SHA-256: f37dd110230575517d1e8615f14ea389c104b014963f3856e1ad9054dc16555e
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://ggtraff.ru/aws?keyword=gamo+air+gun+repair In PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/gozedifatos.pdfIn PDF document text
    • https://lujisitezolip.weebly.com/uploads/1/3/4/1/134109273/pasidatekipajos-wokur-xoxenixarine-zadibax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8f06f4a3fac.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/dizitufo_simoxefojis_zufogemumapuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f87b04f76a3a.pdfIn PDF document text
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/pagirugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f9181c515251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8b42e79ebad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8446/8390/files/wipuzumim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8965/2648/files/amelie_piano_noten_kostenlos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8463/6320/files/mega_man_x3_final_boss_weakness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7632/6054/files/bimasegadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f047577b-76e8-439d-aef5-a77f7661b204/72271702929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5958/2373/files/pigelofiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6470/4155/files/linakuvopobutawuborozadox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cdaaa31-abed-420a-8a60-2667b367882c/twilight_2000_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e420191-59b3-4469-a84a-c3422d4f6705/71714112825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3499/1518/files/67890184006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4299/8938/files/brondell_swash_1000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1450ea49-9720-4ef2-a542-2b2fe20389f6/81720721325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561b7b0b-15d7-4c95-8bf2-5348dcb24d80/lunilorefowumebuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea0fc3f2-6d53-4a69-bb29-9808f81bdddf/suxafolutipoxinojun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/1511/7466/files/norn9_last_era_trophy_guide.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_off00007792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7792 4960 bytes
SHA-256: 8c9410d529801af144baa0b589c553ade19b6457dd9f65e256ecffe37fdc83e6
font_01_sfnt_off0000885f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885F 10448 bytes
SHA-256: 9e9389a275f02579799181df60cedf928d6bd32805c71200faef6555b5bb5b6a

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