Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1b483f2a6fa351…

MALICIOUS

PDF

40.0 KB Created: 2020-10-29 03:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 05516570cd5c73a13dda0283ed89f1f2 SHA-1: edb98ade19ad8c8f662747539cc49dfa968d301a SHA-256: eb1b483f2a6fa351f823e6f3d3819f0f50c3b72a38329bb30cd7c74224d0217f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to disposable hosting services and some lead to known malicious redirectors. This behavior is indicative of a link farm designed to distribute traffic to potentially malicious sites, likely as part of a phishing or scam campaign. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • 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://gettraff.ru/strik?keyword=living+without+money+australia In PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/sopobejojeva-sudorupivenigix-dikosiluf.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/modasofibekozov-mifowatefovovo-mogeboluvawoxu.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/700092120b93.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/be11a7b1b9.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/diwaju-gamuk-pesasubis-xunorobotusuf.pdfIn PDF document text
    • https://giginepa.weebly.com/uploads/1/3/4/3/134389182/dawozuwetekaku.pdfIn PDF document text
    • https://dovasuseburipir.weebly.com/uploads/1/3/4/3/134394860/5199a7391f.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/mupibavog.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/2860881.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/felasorarabipis/jugikodutinesanevuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c817d19c-acd6-4088-b768-e37b4e624d2d/bikibofajagafejoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e435a70f-fbed-4552-ba9b-34776bfd315b/59142160398.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/trumpet_classical_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0377/1547/files/slime_para_hacer_manualidades.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/dorexiseji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7dea2d-71ba-4664-be8d-5b268fdb74e2/93345340376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1638cc-fb8c-451e-9c38-dff14c49c808/4315905374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c19a0c-8b17-42e1-9513-65345f157cf2/bucay_cuentos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/8243162125.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/neet_exam_2020_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecde80f1-6ab1-4de5-9616-2cf1429177ea/saunders_nclex_rn_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/jotodawonagugotelezipusik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0122/3589/files/saguvilevudekul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad43d16-6bcb-4178-99d4-e75fbd9c33d0/xaditoponesoxesixotatipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0470/9029/files/janeselekadedanak.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_off00005e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E92 5296 bytes
SHA-256: d2ca97cd1c47dc7849b4d5a5a6bb68afc041bffec80235e50b18107aa696b62d
font_01_sfnt_off00007086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7086 9800 bytes
SHA-256: ebe4874530ed05d74b517d195bfa02de5ea62c4bb0456016a6b84db773c40adc

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