Malicious PDF — malware analysis report

Static analysis result for SHA-256 30505c2be5b4e542…

MALICIOUS

PDF

76.1 KB Created: 2021-03-04 19:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4b779b2585eb5f430ee4a670f8a70c2 SHA-1: d3af7c1bf626bcaa5bb9d8fc0475c40484005f7c SHA-256: 30505c2be5b4e54211975a5c2ead272c9f87f678f14110d7b4a315a4fa6ec79e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious domain ('xezojetit.ru') and another to a potential link farm ('tujolelulovowew.rf.gd'). The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=how+to+set+timer+on+delonghi+dragon+4
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5ff8b7f49908e.pdf
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5fd09f1595857.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tujolelulovowew.rf.gd/44330947299.pdf
    • http://ziwebizivag.epizy.com/kusapeloxis.pdf
    • http://lumaxixi.epizy.com/why_is_forged_in_fire_ending.pdf
    • https://s3.amazonaws.com/lakadutof/how_to_reset_genie_remote.pdf
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_3a142643b9a445fd8db8788ee700fd71.pdf?index=true
    • https://s3.amazonaws.com/vapite/nier_automata_piano_collections_sheet_music.pdf
    • http://nitovotiroxe.epizy.com/resize_file_to_smaller_size_online.pdf
    • https://s3.amazonaws.com/bitizopovopaso/casio_fx-_991es_manual.pdf
    • http://lipesomidu.epizy.com/police_bmw_car_game_mod_apk.pdf
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_74eaae50ad8e4b47add35f354ed253ef.pdf?index=true
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_d1df99735d0a44ab8f670a3377aa49c4.pdf?index=true
    • https://s3.amazonaws.com/turip/lolubifesutujemugawexom.pdf
    • https://s3.amazonaws.com/gupawupigawono/elementalist_gw2_leveling_guide.pdf
    • http://wabiredozu.rf.gd/lujojaduniruwar.pdf
    • http://lexituvom.epizy.com/puwidukewuwejekuj.pdf
    • https://s3.amazonaws.com/napisakaluja/kojupodalefil.pdf
    • https://s3.amazonaws.com/figidireki/android_imageview_set_background_bitmap.pdf
    • https://s3.amazonaws.com/folexapurilowe/severe_chiari_malformation_type_1.pdf
    • http://lajefuvubesij.epizy.com/ziluxojanuzop.pdf
    • https://s3.amazonaws.com/fonibinaraj/grade_12_english_literature_study_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecac.bin
e990e029affb69a1210c5eda6b3f82964033b04a4f10e89e0463bb8011896027		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 5380 bytes
font_01_sfnt_off0000fed9.bin
128041c90d65aa1a2916345d5818d240ac0b7549ef5d7dfa020dfe14e95215a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED9 10476 bytes

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