Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1a2d0ca123093b…

MALICIOUS

PDF

84.1 KB Created: 2021-03-30 09:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e10788a82fc53508c6eb0ecf8c47c928 SHA-1: bce39beec885a54d25e5d2f0fb5e242545eaa584 SHA-256: 1e1a2d0ca123093bc89d5d472cd646beae9e7bf72356d0ea1784d213cef1e23c
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links, suggesting it functions as a link farm or a phishing lure. While no scripts were directly extracted, the presence of numerous external URLs points towards an attempt to redirect users to potentially harmful sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/award?keyword=maltrato+y+abandono+infantil+pdf PDF link annotation
    • https://cdn.sqhk.co/rawatajizefu/jjjgegc/funny_happy_new_year_gif_2020_animated.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/YDChbje/jumakagerekodebubol.pdfIn PDF document text
    • https://cdn.sqhk.co/xekiparot/gdyhchb/fire_emblem_three_houses_master_class_guide.pdfIn PDF document text
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/8200772.pdfIn PDF document text
    • http://keysecret.ru/71637543989pdvy2.pdfIn PDF document text
    • https://cdn.sqhk.co/xanovika/ih2Ugft/19021367781.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/7Jie1ig/bancabc_mozambique_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/geFhgyk/first_three_steps_for_treating_burns_and_scalds.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/fejux_jugijikew_defuxawim_getok.pdfIn PDF document text
    • http://probmaka.tech/does_qigong_healing_really_workghg9o.pdfIn PDF document text
    • https://waliruwixogipi.weebly.com/uploads/1/3/4/0/134016871/5916056.pdfIn PDF document text
    • https://cdn.sqhk.co/buzovegom/qggjeyQ/pasopomovapezesubavut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dce579ed-4708-43c3-aaeb-2c76a6268d78.filesusr.com/ugd/944939_b89734cf8b184d129b39031e779766e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavale/lamugekixedamimomarif.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/how_to_get_a_software_testing_job_without_experience.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/indesign_programming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/oxford_dictionary_english_to_bangla.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_7f4bc43de1ec4cd0964c6f6058c5ecbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/beats_studio_2_wireless_headphones_manual.pdfIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_ad9b19c844ad473c8b7ed003aad18b63.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_off00010d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D55 5104 bytes
SHA-256: a4645fd7353789fe8ad51971b499d670754a91f3ce94f6c4f892ddfd4b0bd703
font_01_sfnt_off00011ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED6 10972 bytes
SHA-256: 9b89a665f19d6870f54c68b985647f1ed989abb1f51ea4fe03efb7b9a626a14c