Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf687002d5fd4fae…

MALICIOUS

PDF

75.4 KB Created: 2021-03-20 15:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: daa8a92459796514dcd9816fcf576373 SHA-1: bf7a05f576d9f70f64cda96c57bfa6ceae3a81b5 SHA-256: bf687002d5fd4fae541d86ab72165d7ec80a59f2dd2b195341ca6376223ad36f
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs, with a primary external URI pointing to 'https://mezovuduw.ru/wix?keyword=informational+text+structures+page+2+answer+key', suggesting a lure to a malicious website. The presence of multiple disposable hosting links further supports a malicious intent, likely to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://mezovuduw.ru/wix?keyword=informational+text+structures+page+2+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483338/normal_602553b88f3fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_6045f215010e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://forilojemani.epizy.com/child_labour_meaning_concept_and_forms.pdfIn PDF document text
    • http://zepaxawom.rf.gd/xebuzasaguxujaki.pdfIn PDF document text
    • https://9f1be152-2ea1-4306-981d-bfff62ad382d.filesusr.com/ugd/08fb22_7f79e51ac6a24bcbbb9a59c982abf1e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe0b3ae-af6a-4786-ac82-364b0789222d/libebugepebojav.pdfIn PDF document text
    • http://fuwusasasojotaj.epizy.com/harry_potter_und_der_stein_der_weisen_hrbuch_lnge.pdfIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_7de568d6486748fd8b428a5f59861056.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedure/how_to_use_punctuation_with_dialogue.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/operating_systems_three_easy_pieces_remzi_arpaci_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/262fa18b-5e0a-47be-ba1d-355961477e4c/63553022868.pdfIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_db43ddf96df24071809d949b6575599b.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_98a243bfaba34eafa1f7d9ab488afc09.pdf?index=trueIn PDF document text
    • http://dusetelonuzaj.epizy.com/dinabandhu_andrews_college_online_admission_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7bbdb9-30cb-4b39-8110-91495004d0fb/watson_go_to_birmingham_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/find_isentropic_efficiency_turbine_example.pdfIn PDF document text
    • http://fezogax.rf.gd/teacher.depaul.edu_answer_key.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_b4a6f2a8c5b1489b9139a04d84319360.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xelimewat/believer_song_in_tamil_to.pdfIn PDF document text
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_a69edc4cf80040599d3a6ba3d958a93a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD963 5612 bytes
SHA-256: 38c080765e118ff6f726a5b9f4981d891ff105b78f578a5258ae712b1d4a1b78
font_01_sfnt_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 11040 bytes
SHA-256: 016756d690506e4985582e2d14731821720de62582097a53e512c5b0f6319750
font_02_sfnt_off0001118c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c