Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1956e42a71bca44…

MALICIOUS

PDF

92.4 KB Created: 2021-04-05 10:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 89d6b14cbb485b8d82b0c8f2ad0096c9 SHA-1: d3a4690f2b38e257849c1862fd0130c80e7ba357 SHA-256: c1956e42a71bca44971998eef07a8868697d60783b1b22dbd759b2b0035021a4
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'https://baarspo.ru/123?utm_term=caller+id+call+blocker+free+apk', which is likely a lure for a malicious download. The heuristic 'SE_DOWNLOAD_BUTTON' further suggests a social engineering tactic to trick the user into clicking a link or downloading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/123?utm_term=caller+id+call+blocker+free+apk PDF link annotation
    • http://natezaka.iblogger.org/what_is_the_best_bookkeeping_course_to_do.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456712/normal_5ff85ab96eeeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463565/normal_60295c1e66c65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464314/normal_606a6e9811638.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492586/normal_5fc8d63e51586.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/qgjwogh/brave_frontier_2_wiki_japan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444622/normal_605bdceaa6e8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494648/normal_5fd80de22b745.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367920/normal_5ff3c1b1573a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503033/normal_5fffeec95a614.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/dihifcA/free_printable_calendar_template_august_2018.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/paropabaru/what_chapter_is_firmament_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/sirigobipuforojivija.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/candlestick_charts_in_google_finance.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/jofew.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/wynk_game_app.pdfIn PDF document text
    • http://memaded.epizy.com/17660185839.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/following_direction_worksheets_for_5th_graders.pdfIn PDF document text
    • http://sukasorepej.rf.gd/befazim.pdfIn PDF document text
    • http://renubinivudeti.epizy.com/pidomujatezisa.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/lenofoluneribogixagofuz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC3 2896 bytes
SHA-256: ebf639922e01e09f1a7f0d9481782827e830d7167db880b7f65e4b1a06b03241
font_01_sfnt_off00010a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A16 5080 bytes
SHA-256: d81fe8bb2c1addd684675a60226a14427376c651bfc303ba654b8be6a67862e5
font_02_sfnt_off00011b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6E 22404 bytes
SHA-256: c1303a3caf2b924e091351c2789315f5ee6645d51a99066ecb1e221ab55e84ec
font_03_sfnt_off00014e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E33 16204 bytes
SHA-256: 9f650169421b0b7087dd31af68adb40091046a2bb8e16b0442b6a694d872da2e

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