Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7fc366194a995ef…

MALICIOUS

PDF

92.6 KB Created: 2021-03-10 12:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff0415facb47faf9bb886cd1a8ed821 SHA-1: d3646835243bfae32012c843a96bf5d81a49da51 SHA-256: a7fc366194a995ef7891020281bbf0ff006a892c48bc14e3cde0ca17f36fe73b
96 Risk Score

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. It contains an embedded URI pointing to 'resalured.ru', which is likely a phishing or malware distribution domain. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://resalured.ru/wix?keyword=real+life+linear+functions+worksheet
    • https://cdn.sqhk.co/mujutuzidip/hthhWjv/34322467920.pdf
    • http://uabiomanix.xyz/how_much_does_a_water_treatment_engineer_makeoqqev.pdf
    • https://cdn.sqhk.co/dabebasavus/iewhbie/radio_skyrock_fm_paris.pdf
    • https://cdn.sqhk.co/tezofugowura/mihKiew/47470795449.pdf
    • https://cdn.sqhk.co/wabajevebe/jijiggf/nbc_sports_live_stream_sign_in.pdf
    • http://znasila.ru/sun_joe_spx3000_electric_pressure_washer_reviewvzexd.pdf
    • http://sevezor.scienceontheweb.net/delonghi_14_fin_oil_heater_price.pdf
    • https://cdn.sqhk.co/gotofebelu/a8VPyhi/abc_phonics_song_2_words.pdf
    • http://idealica-ufficialeitalia.website/novurenupeforubamavorelbmcd.pdf
    • https://cdn.sqhk.co/lojosexotak/hgjvhbb/14022236113.pdf
    • https://cdn.sqhk.co/vutabopi/hhgcgcm/total_conquest_mod_apk_offline_download.pdf
    • http://raxewaponoxiv.mygamesonline.org/vakirarewigilugupijinuxug.pdf
    • https://cdn.sqhk.co/lalamiteliw/gjZhcP7/fusoluregagawod.pdf
    • https://cdn.sqhk.co/xovepejegosi/gcja5tv/kogiwulusuwimalojotemuv.pdf
    • http://xejepurefe.scienceontheweb.net/brian_weiss_libros_los_milagros_existen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jivamubug/service_blueprint_template.pdf
    • https://s3.amazonaws.com/bejikefowu/dj_bajrangbali_naa_song.pdf
    • https://s3.amazonaws.com/baposivarabuj/thin_rubber_sheet_lowes.pdf
    • http://rodedewezijore.atwebpages.com/wamujotu.pdf
    • https://s3.amazonaws.com/tiduro/superhero_battleground_game_apk.pdf
    • https://s3.amazonaws.com/fewunadupop/gomudinibuzekin.pdf
    • https://s3.amazonaws.com/sewamos/free_balance_sheet_template_for_word.pdf
    • https://s3.amazonaws.com/sejakopa/wizetidoxem.pdf
    • https://s3.amazonaws.com/jijari/77216800604.pdf
    • http://wufikemofumop.atwebpages.com/brick_masonry_in_building_construction.pdf
    • https://s3.amazonaws.com/xixonu/bts_dna_mirrored_dance_practice_mp4.pdf
    • https://s3.amazonaws.com/kezemiradigu/zizos.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f3.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F3 6440 bytes
font_01_sfnt_off000116e8.bin
6513def65efe3d0c7c1759deb5bcbbee8d922e94899b7bc3c07a2659852736b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116E8 5132 bytes
font_02_sfnt_off00012872.bin
21a638502fd370a071d8ac3c9963d7d298a23fc439f494c5b66a656d4f77fcef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12872 11160 bytes
font_03_sfnt_off00014e94.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E94 16036 bytes

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