Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f224f84b5e7422…

MALICIOUS

PDF

74.6 KB Created: 2021-03-30 07:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fd3d62b9e606aa8cbfa3bb0354bfbf5c SHA-1: 03d9b14cde3c453e7d43907789af012e340bd977 SHA-256: a0f224f84b5e7422d7e441167194f579d2ab34fa4664062ccddb52191ac5ad3e
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The document body, though heavily obfuscated, appears to contain keywords related to game cheats, which could be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://golowaki.ru/wix?keyword=diggy%2527s+adventure+cheats+sky+chariot+stables PDF link annotation
    • http://xapowuxif.mywebcommunity.org/affairscloud_monthly_current_affairs_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_605ab29f27399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_600bd047aeb14.pdfIn PDF document text
    • http://onsideball.info/liwisedogibixsdhh9.pdfIn PDF document text
    • http://bigswinner.space/pisofivabusufiliwobothq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_60614d7e3e4c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479710/normal_5ff87f30c89c1.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/tigagiwerusuzewimin.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/gajubo.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://tijejawoporufil.epizy.com/the_little_match_girl_movie_1987_streaming.pdfIn PDF document text
    • http://febiked.rf.gd/48217867075.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_5004b9ea874a4689a4b17057cc945e5e.pdf?index=trueIn PDF document text
    • http://zotuxegusam.epizy.com/algebra_1_regents_august_2019_answers.pdfIn PDF document text
    • http://gulagopafed.onlinewebshop.net/another_day_in_paradise_chords.pdfIn PDF document text
    • http://duwuneloragupi.rf.gd/kendriya_vidyalaya_gachibowli_hyderabad_sample_papers_answers.pdfIn PDF document text
    • http://bajejefi.epizy.com/57087998954.pdfIn PDF document text
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_a9df4fcd64364efd80ab57334e0c98a9.pdf?index=trueIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_da11be6c62c64a058f3e2eaf4df85f7a.pdf?index=trueIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_864790572a0342548f86d657daf0cc83.pdf?index=trueIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_3c4d41841046461995272328228bb60f.pdf?index=trueIn PDF document text
    • http://gitojaxekeveki.onlinewebshop.net/english_syntax_analysis.pdfIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_b4e817ab03474c0f92a702a7175c8621.pdf?index=trueIn PDF document text
    • https://8be317c1-93d6-4444-9a1c-030c84ae583f.filesusr.com/ugd/709942_762a2a58cc3048548fce7c9d04301c5c.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_off0000d810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD810 5484 bytes
SHA-256: 1da1fa17e856acd933d4317c9c5221fa099757c76b2e750473052f2bc5761515
font_01_sfnt_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 10396 bytes
SHA-256: 8fcaaa0fa34060f1ffd7740a47177a8c132466fd51dd5cd02bae3cc6911d50e6
font_02_sfnt_off00010e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c