Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55a2a8fee50a885…

MALICIOUS

PDF

82.4 KB Created: 2021-02-27 00:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dfce80d777be07cf214d39313d6578c5 SHA-1: 83084789062886404de1a546b53e66f11011c250 SHA-256: e55a2a8fee50a885847e333019f619604dbf0e8f226624375dd3eb8f789dd6ab
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that appears to be a lure for downloading software. The presence of embedded URLs and the nature of the ClamAV detection strongly suggest a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=orange+fox+custom+recovery+apk+download PDF link annotation
    • https://cdn.sqhk.co/sulugedako/2ieb6ib/carnival_city_hotel_telephone_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_6009c8743da41.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/ohio_state_university_medical_center_map.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/mgiHQCa/transmission_shops_near_my_location.pdfIn PDF document text
    • http://true-board1.club/37876853254vbo4x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466367/normal_600c66c5e7041.pdfIn PDF document text
    • http://instasale.company/sandwich_maker_recipes_chicken5vsqp.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/RpyigBm/meme_sounds_for_youtube_videos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477658/normal_602ef79d7c434.pdfIn PDF document text
    • http://stakingyfi.com/monster_movie_2014_eng_sub7h33e.pdfIn PDF document text
    • http://idealica-columbia.site/zovuziwabasefaxuzitodissdi7.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/Zhejbig/55670739833.pdfIn PDF document text
    • http://zahlungsservice-ch.site/eleanor_and_park_imagery_quoteseffrg.pdfIn PDF document text
    • http://kozlo.space/peel_me_fruit_vegetables_peel_and_stickpne8w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420915/normal_600fdadc4c8c9.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/mitimaxavenuzosisiba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bomupi/how_to_reduce_cycle_time_in_agile.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/2009_bollywood_movies_list_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/itr_1_sahaj_acknowledgement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/giluwadogekidovobomabexe.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/internal_combustion_engines_applied_thermosciences_3rd_edition.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/58018587055.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/how_to_prepare_for_a_veterinary_interview.pdfIn PDF document text
    • https://www.speedrun.com/tools/TTYD_Cheats_6tf19.zipCreatorIn 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_off0000f5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 5888 bytes
SHA-256: 5553a53fc19859803a606c87334cec20173c69cc45e7a0c7f9fa2f2c57c6f4ec
font_01_sfnt_off000109db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DB 15992 bytes
SHA-256: a90051a921d9f7b1ae58d1ba39118f6a8a191d62d094eb5c0bfef5474a35d748

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