Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6497ac3ce50c32…

MALICIOUS

PDF

75.9 KB Created: 2021-03-18 18:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cb0f281fba36d68903a94dba649cea5 SHA-1: 5faad286b81aca5223b3a96a232516be3999efc4 SHA-256: df6497ac3ce50c32643041b18fb873051360ea37df54473a53ac4264194f4706
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, and the ClamAV detection indicates it is a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to converting webpages to PDF, which is a common tactic for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=convert+webpage+to+pdf+without+ads
    • https://cdn.sqhk.co/rufebumu/hjwBeig/post_it_notes_download_free.pdf
    • http://vykupavto54.ru/auria_pro_apk4hgkv.pdf
    • https://cdn.sqhk.co/pixafosabow/kuShiE4/85606341742.pdf
    • https://cdn.sqhk.co/pibegufuxova/2jhrifF/ringtones_and_wallpaper_for_huawei_phones.pdf
    • http://gojavodevagajuw.mygamesonline.org/pogimenisurinefofojid.pdf
    • https://cdn.sqhk.co/zoluxoni/jhhc4VA/teddi_mellencamp_house_pop_smoke.pdf
    • https://cdn.sqhk.co/lilavokolet/hjnidge/destiny_2_dreaming_city_raid_guide.pdf
    • http://ronifibofizet.medianewsonline.com/pdf_to_ms_word_convert_free_download.pdf
    • http://doweryklkq.space/374087125237o62r.pdf
    • https://cdn.sqhk.co/xekutenupi/j05hfja/red_white_and_blue_balloons_clipart.pdf
    • https://cdn.sqhk.co/wiwokosokif/jAjdThi/ninja_raiden_revenge_mod_apk_home.pdf
    • http://1xbet-regi.site/womens_air_force_1_pixel_summit_white_dark_beetrootop9r1.pdf
    • https://cdn.sqhk.co/guranotup/8jfJzDK/14023498260.pdf
    • https://cdn.sqhk.co/zetuzire/idyFijK/google_chrome_certificate_error.pdf
    • http://kakafeg.scienceontheweb.net/the_phases_of_the_moon_whats_going_on_worksheet.pdf
    • https://cdn.sqhk.co/gimexigerub/Jo2ijKf/learn_python_for_data_science_online_course.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lopadivupudexa/saganawokejodewufotamina.pdf
    • https://s3.amazonaws.com/tiluwisulepam/what_was_ivan_ilyichs_occupation.pdf
    • https://s3.amazonaws.com/dogazisuze/79543730585.pdf
    • http://mewabetowa.myartsonline.com/21000022854.pdf
    • https://s3.amazonaws.com/wobuzisibal/mupafobigitobuwebaruzuta.pdf
    • https://s3.amazonaws.com/baritexovopa/jikitov.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb71.bin
39a09df8755934e38f07a3f987b14e1df9394cbe4cf13e5e734a42b41a8b7a99
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 5468 bytes
font_01_sfnt_off0000fe13.bin
a5096cd163564092b314512d81fe5b084d00e26853d4ec2b218c8dc57d1b9132
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE13 10516 bytes