Malicious PDF — malware analysis report

Static analysis result for SHA-256 68647032e42092c2…

MALICIOUS

PDF

85.7 KB Created: 2021-03-16 14:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6a200d564d7eb5cbabb43a79aa901d96 SHA-1: 38292211134c7095db9baad1df8cf44edc17a168 SHA-256: 68647032e42092c2747a7b59485a2b9fc576965f8fbf5bc7cfccad61f0c56c15
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/123?utm_term=sound+booster+for+pc PDF link annotation
    • https://bezodidamivozel.weebly.com/uploads/1/3/2/6/132683328/cbc25428c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_602babb939439.pdfIn PDF document text
    • http://chambreop.xyz/86369602710ntr0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449769/normal_600e45082b9d5.pdfIn PDF document text
    • https://cdn.sqhk.co/soxosovave/cifDjab/retro_11_snakeskin_blue.pdfIn PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/sipodubenun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5fc65db84355a.pdfIn PDF document text
    • https://cdn.sqhk.co/topedimerab/EgOhiSq/city_car_driving_2017_android_oyun_club.pdfIn PDF document text
    • http://crysety.xyz/washington_redskins_quarterback_2020tvpia.pdfIn PDF document text
    • https://xajerunufunofe.weebly.com/uploads/1/3/1/3/131378991/sesetiwigedejanaja.pdfIn PDF document text
    • https://cdn.sqhk.co/wozovege/gcjgDgj/viwojuwidesetosataku.pdfIn PDF document text
    • http://moneyindia.site/2418827877444zil.pdfIn PDF document text
    • http://itnegozio.info/formatos_para_abrir_una_empresasmc5b.pdfIn PDF document text
    • https://rifojiditesi.weebly.com/uploads/1/3/1/3/131379396/8511252.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/jeicgeD/dijudekopuwapibedatalej.pdfIn PDF document text
    • http://fionainthefield.org/bonny_light_horseman_sheet_musiclcrcm.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/fidefofudi/84957817512.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/66778437994.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/95114137479.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/nujevenaletibewodedigug.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/57963020635.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/perbedaan_uji_parametrik_dan_non_parametrik.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/41750129538.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/55960799185.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 6564 bytes
SHA-256: adb950862ae8465be62e3a5a0f7b0e13a988f89aa6ddf7c1faa3cd2c6402b724
font_01_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 5148 bytes
SHA-256: ab8f343878d5febb6775b337b34db667c77221ec4e2e633fd0eff142a09a28ea
font_02_sfnt_off00010de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 11140 bytes
SHA-256: efb29f40057db5dd58748be94d5f2df7dbd0c7da12d908169dde36530e6acd17
font_03_sfnt_off0001342c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342C 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940