Malicious PDF — malware analysis report

Static analysis result for SHA-256 9546104f9142ba7a…

MALICIOUS

PDF

92.3 KB Created: 2021-03-21 11:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5e701095b49d3dc6a04674cd6d2565c SHA-1: 998e72c74cb8799df493676deb8b6efd7353c516 SHA-256: 9546104f9142ba7aeba2e20fa28929666d1187f25b740b67628919ad124c069f
136 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating an advance-fee scam lure. The embedded URL, 'https://midufefew.ru/wix?keyword=ikaw+lang+ang+iibigin+dec+22+2019', likely serves as a phishing endpoint or a download source for further malicious content. Although no scripts were explicitly extracted, the PDF format and the nature of the lure suggest potential for embedded JavaScript to facilitate the scam.

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://midufefew.ru/wix?keyword=ikaw+lang+ang+iibigin+dec+22+2019
    • https://cdn-cms.f-static.net/uploads/4471682/normal_601b052b1dcfe.pdf
    • http://barajofa.mywebcommunity.org/how_do_i_change_the_pin_on_my_chamberlain_garage_door_keypad.pdf
    • http://xifasiv.getenjoyment.net/73933696212.pdf
    • http://nibodilakiwote.22web.org/alexander_the_great_dog_names.pdf
    • http://vovavipegum.getenjoyment.net/breakers_light_novel.pdf
    • https://static.s123-cdn-static.com/uploads/4369776/normal_6001651fbcb88.pdf
    • https://static.s123-cdn-static.com/uploads/4474470/normal_5fce7254ea4dd.pdf
    • http://vebuwovivulab.mygamesonline.org/96918737316.pdf
    • https://cdn-cms.f-static.net/uploads/4417046/normal_601ddd0c18a9b.pdf
    • https://static.s123-cdn-static.com/uploads/4448719/normal_600399378a1da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lizolubemerawi.epizy.com/ielts_speaking_part_3_sample_questions.pdf
    • https://uploads.strikinglycdn.com/files/352c4b3b-7a84-4651-a713-4a6783ca1a79/dna_replication_diagram_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/b0bb4595-4643-4ee0-bfcc-9686f2017c2c/how_to_write_a_6_paragraph_argumentative_essay.pdf
    • http://fobonerenajob.epizy.com/skype_7._41._0.pdf
    • https://s3.amazonaws.com/wifukedot/55806385001.pdf
    • https://uploads.strikinglycdn.com/files/dae4b928-208b-4fdb-8282-b9d6589fe062/70329909012.pdf
    • https://uploads.strikinglycdn.com/files/cc8d7864-5317-47da-913a-1e9457ac5441/modelo_de_nomina_2020_excel.pdf
    • https://s3.amazonaws.com/bivanud/kifan.pdf
    • http://xopozajuve.epizy.com/22987528705.pdf
    • https://uploads.strikinglycdn.com/files/5b263158-195a-487c-b5a3-641882e0b3a5/23719177166.pdf
    • https://s3.amazonaws.com/nerugiraxura/glioblastoma_multiforme_grade_4_icd_10.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_off00012723.bin
c1a435db7a70d5767f2b01266f67773f2b8eac54de7b8f8c2bfc6e4251da7fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12723 5548 bytes
font_01_sfnt_off00013a3a.bin
dd9ac5904f6741b677f01b2a27d683187ff13d55446e86f8e503a501b8f84299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3A 13056 bytes

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