Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea04c182a6e222c…

MALICIOUS

PDF

42.0 KB Created: 2020-10-16 02:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a944d7b3cb1964c70a5a2a4bffef385a SHA-1: 95a401da1e508663d16ecbfac66e59692844a740 SHA-256: bea04c182a6e222cc931e47567b153946132f54249b5c578e6f7b3deec981d39
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically directing users to download an Android APK. The document body and numerous embedded URLs reinforce this lure, suggesting a phishing attempt to trick users into downloading potentially malicious software. The ML classifier also strongly indicated maliciousness.

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://ggtraff.ru/123?keyword=download+android+kitkat+4.4+system+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86f5ce63e16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f875db242533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f87f49eec013.pdfIn PDF document text
    • https://site-1039201.mozfiles.com/files/1039201/45250536876.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/malibujasizifuxoxamodafaj.pdfIn PDF document text
    • https://site-1037909.mozfiles.com/files/1037909/15784037799.pdfIn PDF document text
    • https://site-1038567.mozfiles.com/files/1038567/lusapoxofasivup.pdfIn PDF document text
    • https://site-1040360.mozfiles.com/files/1040360/gigoxorojusubasusevosozi.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/1/0437/7057/7045/files/ctoni-2_report_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/canada_citizenship_test_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/eleanor__park.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7147/9709/files/livros_de_mario_vargas_llosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6940/2009/files/encyclopedie_mdico_chirurgicale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5254/5686/files/brave_souls_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1500/4582/files/nowisuzotifejedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/73255556097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9047/1832/files/8162222899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee5d795-91c1-4aaa-903c-7177bbdc249e/romijamivafidewusogulapav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b1b9bd-97eb-4324-8980-7225e81091cc/bowaguxikanuvuzimeludopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3867880-cc89-4555-bbd0-be73ff6ed552/39070766211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d9751a-0fbd-4042-881c-eb5fc0d4e141/junumoxoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c42789-17bf-4b7b-84de-a5e8dcd67962/gojunadatitokepoto.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_off0000644f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644F 5484 bytes
SHA-256: 6df2791cd0548dcd7a1cb7c0cff782d92097ced9c606528da228df1988882dfd
font_01_sfnt_off00007702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7702 10612 bytes
SHA-256: 3e38ecab194495430bfedbc933c4dbfcfe94d45bc489d6c0a801ee6328be357e

Open this report in the interactive analyzer, or submit your own file for analysis.