Malicious PDF — malware analysis report

Static analysis result for SHA-256 805c3c338ff865ef…

MALICIOUS

PDF

81.9 KB Created: 2021-03-07 05:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d7103322ec86d24e9bc399f0e35d109b SHA-1: ae31ca11324b7ab5b91f489cedfc1f9ba782e2b4 SHA-256: 805c3c338ff865ef338bb041cf4eeedccb78863082a1c9dbbbaf9528a4951120
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to "Spaghetti tower challenge rules". No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=spaghetti+tower+challenge+rules PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425726/normal_600c7c3fbf7d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465007/normal_600ceddf247de.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/bubata.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446646/normal_5fe16d112468b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365562/normal_5fff12ce9f3f4.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/kebom.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/how_much_did_indie_games_make.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497346/normal_5fcbc39ac0fff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382627/normal_5fed8fe40d6b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484093/normal_6032c95c2e15f.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/lonokaropuruvaguj.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/the_ravenous_pig_brunch_menu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewogaki.rf.gd/putodukuvuf.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/dubitifusajewow.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/moto_bike_race_game_mod_apk.pdfIn PDF document text
    • http://taludoxatimepup.rf.gd/84003743526.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/95020775090.pdfIn PDF document text
    • http://nemevefer.rf.gd/gakazak.pdfIn PDF document text
    • http://vajexakatozezal.epizy.com/74125098818.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/hepatitis_d_virus.pdfIn PDF document text
    • http://duwuvafufupi.rf.gd/fluke_754_documenting_process_calibrator_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/android_textview_capitalize_first_letter_programmatically.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/hundred_soul_fellow_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 5388 bytes
SHA-256: 067e0f6cc5834c596875e469263137d4c3a496386002facee241f42858486333
font_01_sfnt_off00010017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10017 10684 bytes
SHA-256: ecf58105bdbd41908c9040db2751a71468297f9089caf3673c1b1af857752239
font_02_sfnt_off00012456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12456 16144 bytes
SHA-256: c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b

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