Malicious PDF — malware analysis report

Static analysis result for SHA-256 042eefdc1de423bf…

MALICIOUS

PDF

51.2 KB Created: 2020-10-28 01:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddac832c7d527a93b6a4e74c8e211d21 SHA-1: 1d7b6f1ddd40342cc8deb2e460a652621db9b2b8 SHA-256: 042eefdc1de423bf7ce408754602608577797080489164e5b023252430018cba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. The primary attack pattern observed is the use of a link farm to direct users to potentially harmful websites, possibly for SEO spam or phishing.

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://ttraff.ru/123?keyword=maigret+in+montmartre+plot
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/datopufufixu_desavinux.pdf
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/pinevo-donibalaguwozu-gofuwepoj-rolajezuke.pdf
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/dukuxoxusapev-nimejufososube-fejusitenev-bamukizabojofu.pdf
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f90b623f094b.pdf
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f93f6e4c59e3.pdf
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f8a4e1912edb.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/bosajewowoj_rubuvakun.pdf
    • https://jafakatulo.weebly.com/uploads/1/3/4/3/134353771/8325007.pdf
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/sizupezezalimubaripi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vutame/gefalivapaz.pdf
    • https://s3.amazonaws.com/jidosatikim/applications_of_mathematics_in_medicine.pdf
    • https://s3.amazonaws.com/kopisigapub/durojugedibubu.pdf
    • https://s3.amazonaws.com/zuxadol/email_writing_skills_in_english.pdf
    • https://s3.amazonaws.com/wewuxuviwar/bakomagikavaxininekoje.pdf
    • https://s3.amazonaws.com/tesodagiwor/types_of_time_series_analysis.pdf
    • https://s3.amazonaws.com/julaxel/abstract_algebra_beachy_3rd_edition.pdf
    • https://s3.amazonaws.com/vobuturinivi/mudewobogigi.pdf
    • https://s3.amazonaws.com/jadere/gaceta_oficial_de_cuba_aduana_2018.pdf
    • https://s3.amazonaws.com/gupuso/55665783161.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d04.bin
6e45bf8966f73670d3eea235ab07b3e8119ebaa011eabf7c59c8708e20a40fe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D04 4756 bytes
font_01_sfnt_off00008d0c.bin
2f7dbb34b44587085b4809a43e471f9fcd7b17f392889b1404c71d88c32365af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0C 10624 bytes
font_02_sfnt_off0000b131.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB131 4324 bytes

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