Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48ff40506930065…

MALICIOUS

PDF

43.8 KB Created: 2020-11-03 16:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3972e2ebb144649342eb4371358dfd64 SHA-1: 18eead6012215504775c4d480de93b1bdfed4ec1 SHA-256: e48ff405069300650ccba7547c34cab340da73efb3b1bd035004379bb4c875e5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded URLs that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for downloading an "apk", suggesting a phishing or malware distribution attempt. The ML classifier also 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 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://ttraff.cc/123?keyword=movie+hd+apk+latest+version In PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/0933f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f87853675dd8.pdfIn PDF document text
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/rizepefonatove.pdfIn PDF document text
    • https://pezosoxebigaxox.weebly.com/uploads/1/3/4/3/134337327/ramebefokipas-maguz.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/fetebum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f876a36b0781.pdfIn PDF document text
    • https://gepinizidewepi.weebly.com/uploads/1/3/4/3/134305752/0279cd9c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418362/normal_5f9a9aa2e8d58.pdfIn PDF document text
    • https://wunamixexot.weebly.com/uploads/1/3/4/4/134456109/magakijejak-vatefikadefob.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/xosamolejelef_dorunopijupu_gidabajopopum.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/dobawozutasu.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/72b7f61a-3964-4cf6-89bf-49f212f043f2/12715304716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f5abf3-6127-4ed7-b51a-01e48cd6e5a2/14574211579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c954736c-8fc1-4149-ad89-45862990b7a1/davovoriwokisazoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88f18ac-8455-4995-a420-cec6304f9a03/sasipawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb13cf95-548b-4f07-a876-1fd74278674b/56582985975.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_off00006b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 5176 bytes
SHA-256: 4068c6fb5d32fc16367a4b744b4215e9cb6b017c9ef23b99634cac89c1eac8ac
font_01_sfnt_off00007d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2C 10828 bytes
SHA-256: c2efac1eccc149411805904628807a73d48d053f328b48e6252bc99006ac00d9

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