Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f09ff211f2732af…

MALICIOUS

PDF

142.9 KB Created: 2021-03-23 03:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d1327e86a3ebdb24b8bb02764ef2c6ef SHA-1: 24a7ce317355d808130bc5b43589b82ce8a55c90 SHA-256: 5f09ff211f2732af8c48bbcb96273b77bc1bda313ef6281d1c00f7c952f0ac23
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicates maliciousness. While no scripts were extracted, the document's structure and URL distribution point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9749

Heuristics 5

  • 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 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://dugedepap.ru/award?keyword=arrl+satellite+handbook+pdf PDF link annotation
    • https://cdn.sqhk.co/pasojixaju/eifSjee/olvidar_preterite_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495525/normal_602b8039d08d7.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/4799076.pdfIn PDF document text
    • https://vetepoxep.weebly.com/uploads/1/3/5/3/135302771/3911551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_60418cccb05bc.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/ij54hjY/ice_cream_sandwich_around_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fed5e4f85c77.pdfIn PDF document text
    • http://wapajojakazewi.iblogger.org/nigavaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500430/normal_600e95105a0ca.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/kulogevurogo.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/Ljgihig/71537872458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_60571ca0dfd48.pdfIn PDF document text
    • http://dibesugumika.iblogger.org/chopin_ballade_3.pdfIn PDF document text
    • http://panedapupugaxe.22web.org/kidofazawolujatikiton.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://ruzuvune.epizy.com/access_bars_chart.pdfIn PDF document text
    • http://xisebugiraji.epizy.com/the_dot_by_peter_reynolds_printables.pdfIn PDF document text
    • http://kobinegugagikag.epizy.com/66841458377.pdfIn PDF document text
    • http://sizilave.epizy.com/how_do_i_get_my_work_copyrighted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ef2a9f-d88c-4d3d-995f-9d02a95784fd/sawanilebufan.pdfIn PDF document text
    • http://fasizoj.rf.gd/bing_crosby_christmas_songs.pdfIn PDF document text
    • http://ramejepazino.rf.gd/valuzuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845d7fe8-0949-4088-bc54-0e8ab70f37d7/how_to_apply_for_a_disability_pension.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa5d525-99b9-424c-beed-d187a303cae3/9643079101.pdfIn PDF document text
    • http://noxikemudenuma.epizy.com/80995747292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12bb2db9-cb10-46af-bc56-f63a0da20b10/xilizizudetewozenibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10cd744a-79a5-4cbd-aed1-1ae9c62f4964/85572229840.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B668 14668 bytes
SHA-256: b20f3a6f6efcb4e8d89fe7c526204c8040962d140e57a8388d493af24edafbaf
font_01_sfnt_off0001e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E56F 5112 bytes
SHA-256: d237171d4030a1763568675696e4d7699d9d065d1c9a197b76c695c4e93750cc
font_02_sfnt_off0001f6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6AC 11904 bytes
SHA-256: 9b636c5d03af76152c8e04f04b671dd09d1f6d7d9ebeb4bea2c06b77414ad0d1
font_03_sfnt_off00021ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21EF5 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e