Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d5bb9aae5c87f0…

MALICIOUS

PDF

78.9 KB Created: 2021-03-31 22:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d1ef5454c266b26288b6259595191ba4 SHA-1: bc126f074021e6758c2e9f78533e23d8b80e6038 SHA-256: 24d5bb9aae5c87f08d59d93b23e998c140a2fc42671e7cf2bd67477e825ed9d3
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'affairs cloud current affairs pdf free'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/award?keyword=affairs+cloud+current+affairs+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411219/normal_605a79f6ea0ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449992/normal_60197bc2eddfd.pdfIn PDF document text
    • http://kekebol.iblogger.org/kagasegogidelebabonaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377120/normal_5fffdaba8c511.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447265/normal_6006b2df32eb6.pdfIn PDF document text
    • http://rilizikurejoru.22web.org/73003426194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468289/normal_60223a319cfef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mivozupulakirad.epizy.com/how_to_install_pirated_office_on_windows_10.pdfIn PDF document text
    • https://679cd94f-bb1f-411a-9684-d99498fe93d6.filesusr.com/ugd/ce16d4_84288613e3d4499f83e0b17f86ec3232.pdf?index=trueIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_5190b6ec4c0148ba9667cf8e1960751c.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_c8e4cd4420c0495d8e42c28b68dc57da.pdf?index=trueIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_39787c0a9a654ae3a20591b8328c9824.pdf?index=trueIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_722e6888d33f420ca2e7ff5447f10f9f.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_b51a44b08d4a4847b420e6468c5ec8c6.pdf?index=trueIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_2528c7d03c9e4665ad393889375206d8.pdf?index=trueIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_f0f5ec3d443e409091b6ab85ef69142d.pdf?index=trueIn PDF document text
    • https://9505ca4c-dfdc-4941-8fde-ded35496d0c9.filesusr.com/ugd/2097ab_465ad8e81afd40828dbd32f7ed821f28.pdf?index=trueIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_c5926f69cdfd4b718c2eac6b027b8a56.pdf?index=trueIn PDF document text
    • http://walogoke.epizy.com/35278890408.pdfIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_4b5e4ef22a71499f92dabf58257b5dd4.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_467e23e7883b40838989bf032a0dfc49.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_fc0d02863ed84a758e170abde84e01be.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_aabe59dcf871471bbc1c37da8a1ced6b.pdf?index=trueIn 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_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 5140 bytes
SHA-256: 25e701a8de5e138abe1b99bc848e9751e1786bb57ef47e7018abf70b8762197b
font_01_sfnt_off0001047d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047D 11648 bytes
SHA-256: 2b3ae2d368f124df014b61637d4b22b1ced2aba2cf8dc2cd3c1650622edc6ce2

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