Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a73622d9cabcaf…

MALICIOUS

PDF

45.1 KB Created: 2020-10-16 09:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 60b18161d437fa2bf7d8fb3db5f65253 SHA-1: 698a1cc261589e056b4c4b4e772e6061232672c5 SHA-256: e4a73622d9cabcafad9da861b11927c0de7543ef8a33e21973d61bf18d5878a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure and link farms, indicating a malicious intent to drive traffic to potentially harmful sites. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a train simulator manual, suggesting a social engineering pretext. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=train+sim+world+ruhr+sieg+nord+manual In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/1346883.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/8216744.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/lafikaxerikadaxigaba.pdfIn PDF document text
    • https://meporolokiso.weebly.com/uploads/1/3/2/6/132681401/5471893.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/zetosat-powetaz-wuviwabegevuz-xerarukekesudax.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/7297961.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/vopisovaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f8919ba78e3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f88a0916a1f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f88d02ad2177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f875f202609c.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/1/0432/4202/9215/files/romarenefofotusunozena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6872/3878/files/redback_boot_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf9cbfe-59aa-43d3-8b07-b08dd857b57f/bugefaxosezopaxusisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b094cd94-6bb0-4768-bc86-db8dc590c3f7/18486803000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f65aa5fc-9f98-4667-a4d4-7271e32dfbfb/wunewate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77db533-c9a3-4a9d-86a7-31b5c9c89d49/57725743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6207aa-ddcd-4277-92f2-f15693ecbc5a/nomejademil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0079/1715/files/gijonexixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0245/4428/files/mi_vida_loca_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7589/5989/files/9254523294.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_off0000638f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638F 5080 bytes
SHA-256: 49bf35c196948618898d8e479f32b57f3b3bd05766f557ec2a9d5688544dd810
font_01_sfnt_off000074a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A1 10544 bytes
SHA-256: cca547dc691a2744820b5bce88d2128a685291e77ef5a789f9ab34a5fdc70ff9
font_02_sfnt_off000098bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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