Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdfd354ca30bcc6…

MALICIOUS

PDF

103.1 KB Created: 2021-05-03 19:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f78a33313abad34376f563c5b1a8f7b3 SHA-1: 9ef6e2c5d8ec7bf0ca66c06816474af5f6945964 SHA-256: dfdfd354ca30bcc68dffd99853ae8d999ad0df3d28d64ed1de7de3fb3ce9f2b7
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious and phishing-related. It contains an embedded URL that directs users to a suspicious domain, likely to host malicious content or phishing pages. The document body, though heavily obfuscated, appears to be a lure for media downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://midufefew.ru/strik?utm_term=sherlock+holmes+2+download+in+hindi+300mb
    • http://neojust.ru/john_deere_tractor_parts_catalog_indiafjgru.pdf
    • https://static.s123-cdn-static.com/uploads/4454968/normal_5ffe4d3088216.pdf
    • http://fajafifog.mywebcommunity.org/bronkitis_akut_pdpi.pdf
    • http://zabavnyi-slon.ru/82995486890tbwrz.pdf
    • http://botefin.medianewsonline.com/briefcase_allowance_dopt_order_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4469860/normal_5fdc4ea11c295.pdf
    • https://cdn-cms.f-static.net/uploads/4388038/normal_603b8f80c44ab.pdf
    • https://cdn-cms.f-static.net/uploads/4417818/normal_601b658777e32.pdf
    • http://youla-24.cc/38138921160h01un.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.orgThis
    • http://www.fontrix.comhttp://www.nhncorp.com
    • http://fuvuvadut.onlinewebshop.net/gomukovibewesetixevesanek.pdf
    • https://uploads.strikinglycdn.com/files/4211c263-2337-4bf4-a0e9-0b2c414e3039/lcm_hcf_worksheet_class_5.pdf
    • https://uploads.strikinglycdn.com/files/f1cf5834-735c-4211-aa61-adbe9c36204a/identidades_trigonomtricas_ejercicios_resueltos_faciles.pdf
    • http://xudufefi.rf.gd/impresora_canon_pixma_mg3650_manual.pdf
    • https://uploads.strikinglycdn.com/files/edd9c149-e43d-48ba-836f-b5dc16264794/68877757262.pdf
    • https://s3.amazonaws.com/kofabube/evaluatepharma_orphan_drug_report.pdf
    • http://pabewuvuxaf.onlinewebshop.net/86621337088.pdf
    • https://uploads.strikinglycdn.com/files/50c83c66-e656-41f9-98d0-f45b72784b54/5500407838.pdf
    • https://s3.amazonaws.com/zerepuzuze/kenmore_90_series_gas_dryer_repair_manual.pdf
    • https://s3.amazonaws.com/gozifep/tepixer.pdf
    • http://kakekixidowaj.rf.gd/cvc_word_family_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/c38784b4-6640-4b23-9b96-1ae4aaa961c3/53602620124.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
    • http://scripts.sil.org/
    • http://scripts.sil.org/OFLAbyssinica
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f086.bin
5b76ae13de78e6bdf88dc719df1284cc762203420003c1dafdfadb23db5e63f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 6016 bytes
font_01_sfnt_off000104da.bin
aa890c11d31957efca0fd402aa72a454fd9b4193136962196ca6c8da92cd1596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DA 20968 bytes
font_02_sfnt_off0001250a.bin
2d29c30a5a71e18ce40aba71cf2ea5af2df45bd536a3ac7ef407cbcbf5c16c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1250A 7512 bytes
font_03_sfnt_off00013d39.bin
04d00fe4d3d1cfb13f6c45ea00a1a16b92fe51d00c0709aca980b96f225372d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D39 2276 bytes
font_04_sfnt_off00014706.bin
72122438564d03061aed0e69929a4e6cca149cafb04fdca2c1dff3f2997df50b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14706 11588 bytes
font_05_sfnt_off00016e6a.bin
2e46b36fed23876ebb6e11f7a152916482bd8967c060a582f04975efc8a71266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E6A 2056 bytes
font_06_sfnt_off00017758.bin
0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17758 16168 bytes

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