Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d3cc52702cf9f0…

MALICIOUS

PDF

77.3 KB Created: 2021-05-02 09:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 44cb30ed36f94e26d20b8d552a9864ad SHA-1: e7c2a18f5da1e89c5dd4eaf105c7ea2a9086933b SHA-256: 39d3cc52702cf9f07cb53da12b6ecda1a6853d7848d72e723a5ecbc7f2aa76c5
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the ML classification strongly indicate malicious intent, likely involving redirection to malicious sites.

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://resalured.ru/strik?utm_term=the+every+other+day+diet+by+dr.+krista+varady+pdf PDF link annotation
    • https://cdn.sqhk.co/vapiwibisa/p8xlqF7/handwriting_practice_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_60178a5c50ecd.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/jhieagf/snes9x_netplay_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/gcjhtZB/mogomagemenaponixojo.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/ancient_egyptian_history.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/Dhehdhf/wolf_of_wall_street_true_story_wife.pdfIn PDF document text
    • https://cdn.sqhk.co/morureju/gxbhdc9/vasorumujejo.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/suwisimogusimukur.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/gheH1zP/crazy_for_speed_download_for_pc.pdfIn PDF document text
    • http://tuzutug.iblogger.org/23494543998.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/gPgghy4/kefidaxajelufasagu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447464/normal_5fc573f89d03a.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzixamover/FCNjegc/dupozidi.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/iBbhiAZ/how_to_use_easy_auto_clicker_2._0.pdfIn PDF document text
    • http://nubilofanekib.mygamesonline.org/xomutame.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fixobijuruloluk.rf.gd/biography_of_bill_gates_download.pdfIn PDF document text
    • http://fidekuku.epizy.com/columbus_blue_jackets_schedule_2020_19.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/why_does_my_polaris_280_run_on_its_side.pdfIn PDF document text
    • http://gulaguwiz.rf.gd/vodije.pdfIn PDF document text
    • http://wusanobe.rf.gd/vitamin_b12_food_sources.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 5444 bytes
SHA-256: e14291c289f5f0985aebe4dbb5c3f92dc0dc948e0b02abeafa5c070baf87733c
font_01_sfnt_off000101d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 11300 bytes
SHA-256: 1bf432a94c496940eb0f0816697d7da451d0de03f7082829e2a5bb5ec4158a86

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