Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b70433c002d774…

MALICIOUS

PDF

83.0 KB Created: 2020-12-13 23:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 36c585f860699d2398b97fa6fcb1f80f SHA-1: 8aae84658823a183e5b92b0e1f5de6d10894441b SHA-256: f8b70433c002d774ea024a4163b1a09199accecf65437d8db4d481383ddc96c3
244 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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?utm_term=convert+arraylist+to+charsequence+array+android In PDF document text
    • https://vobelerevofago.weebly.com/uploads/1/3/4/5/134596527/wusebar.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/sosiguxavi-kivavu.pdfIn PDF document text
    • https://povizizumor.weebly.com/uploads/1/3/4/6/134636509/002909bac72bd68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_5fa893815625b.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/3472162.pdfIn PDF document text
    • https://wegupufula.weebly.com/uploads/1/3/0/8/130813429/kosusubevogiban.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/suwumadevurigi.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/5a2011e1-318d-4088-a744-b256e867ae5f/dufinanudokuzesejixijad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64fc38d-c427-4252-87c9-dcd38a4a5c0c/vefuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/606bef27-74e0-4c2b-b908-6e70f5e49e2b/248419332.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e727ea4a794d5645064f/t/5fc1863ae18c5c478e358a0b/1606518331265/tuziselileverubufovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067f3ef6-cf86-44e5-9f1d-a4656e220a9d/images_of_happy_birthday_to_my_son.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc169c2bf71053ccb13c602/t/5fccfe8c5177ea328cc4d95e/1607270028474/11st_10_into_lbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c99b15-dad9-493b-bf0c-391e5361b659/gupupilajewivajibema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/565219e6-28ad-43d0-8c36-517b8c22b343/pegemewevarupixolapupa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010f7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10F7D 25408 bytes
SHA-256: 1e7230f1f2e17f50bf69ee8393fa8a688ac9917a4b4ae849bb1bc7aec646b0ac
font_00_sfnt_off0000d5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C0 5220 bytes
SHA-256: 3970b811ab683969ede3cf047740178aa081055951f33e21692b6840d03205ae
font_01_sfnt_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 11640 bytes
SHA-256: b4ca07dd4373deef8b0132950baf1ed04107b44e4a00b401ecff813a46c841b2

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