Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d6d378af4d55bf…

MALICIOUS

PDF

110.6 KB Created: 2021-03-17 19:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40419caaef24b0ebd871a93573281dfe SHA-1: d7a900b0c1811e3ba76bced8ea125a9f98ba0701 SHA-256: 31d6d378af4d55bf331b5cdfc0f199aac018fda84dbf52a866f604993c974f9d
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that directs users to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of an external URI and the nature of the detection suggest the PDF is designed to redirect users to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://vilenefex.ru/123?utm_term=internet+radio+recorder+pro+apk
    • https://static.s123-cdn-static.com/uploads/4370286/normal_60087a8c1bbf6.pdf
    • http://1xbet-sportstavki.fun/2005_jeep_grand_cherokee_5.7_hemi_trail_ratedva06r.pdf
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5ff7b4b025cf1.pdf
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5ffe0ad15b0c3.pdf
    • http://hurleyshamburgers.com/anime_tv_apk_iphone1rsn1.pdf
    • http://kungfumalibu.com/evinrude_25_hp_etec_pricel2scj.pdf
    • https://cdn-cms.f-static.net/uploads/4451945/normal_6040c29522d37.pdf
    • http://fibiver.mygamesonline.org/11502740962.pdf
    • http://toppiksnack.xyz/the_black_keys_lonely_boy_tabag5lo.pdf
    • https://cdn-cms.f-static.net/uploads/4384468/normal_604dce757f080.pdf
    • https://cdn-cms.f-static.net/uploads/4475562/normal_602e0a5acbb2e.pdf
    • https://static.s123-cdn-static.com/uploads/4485005/normal_5fc93f67c9c6e.pdf
    • http://registrat.space/jidamomibigrh6ku.pdf
    • http://penageli.getenjoyment.net/54906458888.pdf
    • https://cdn-cms.f-static.net/uploads/4460473/normal_601ca1e7d3ccc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zebarufuridorur/3777946698.pdf
    • https://s3.amazonaws.com/nevovumowa/character_bio_template_google_docs.pdf
    • https://s3.amazonaws.com/semuxemakaw/4691199159.pdf
    • https://s3.amazonaws.com/wiwamoxamo/34516882339.pdf
    • http://xowilewegiwo.myartsonline.com/69378976933.pdf
    • https://s3.amazonaws.com/vufuzewasi/86348544587.pdf
    • https://s3.amazonaws.com/jazofi/33730004833.pdf
    • http://dolanuvusipegu.myartsonline.com/top_sirloin_steak_on_george_foreman_grill.pdf
    • https://s3.amazonaws.com/zedilegol/best_picture_effects_app_for_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94e.bin
f839be89e78365c6a309ad74df6de8817f73560e2251af703813994cb09cc2bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 44764 bytes
font_01_sfnt_off000171c4.bin
2621faac4c936c78f39f03b523eb8f63933caf9fca0b74ebaaf8ecef4ae8b722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171C4 4860 bytes
font_02_sfnt_off0001825f.bin
43b2e3a16332b95fcf3f3d324967e2df94a8073774d045782d67d297f504a31b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1825F 11872 bytes

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