Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b6e39169c5d8c8…

MALICIOUS

PDF

511.4 KB Created: 2021-05-21 12:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 547c7817956da1573e20e9b7e4396995 SHA-1: bef1daf713e9fd4dafc08abf350acda377816af8 SHA-256: c0b6e39169c5d8c8a344296dac93f613281813a2c53c0852c0998cfff3be91a6
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which is a suspicious domain ('resalured.ru') that appears to be part of a phishing lure related to game downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests the document's primary purpose is to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7145

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://resalured.ru/strik?utm_term=bubble+shooter+games+free+download+for+mobile PDF link annotation
    • https://bowiromifax.weebly.com/uploads/1/3/4/6/134613330/sokeru.pdfIn PDF document text
    • https://magagitu.weebly.com/uploads/1/3/5/9/135959352/1355231.pdfIn PDF document text
    • https://gesurori.weebly.com/uploads/1/3/4/3/134353915/jajufenosin-mupamot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393029/normal_602b7bef0b015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_6059fef646cba.pdfIn PDF document text
    • https://jupepirime.weebly.com/uploads/1/3/4/3/134313464/mabamarajabaxib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_60475624e6a8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414682/normal_600c521f9c040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_605fff9fec9a4.pdfIn PDF document text
    • https://jetabasujupeg.weebly.com/uploads/1/3/4/7/134703241/telexenet-kolesolalev-gavedegosuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5fe84ce6a81f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500430/normal_600a03f665317.pdfIn PDF document text
    • https://pupifino.weebly.com/uploads/1/3/0/7/130776741/2d32abef198fe7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409405/normal_5fe2449531a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_600e5d71cc184.pdfIn PDF document text
    • https://vowawekalumuz.weebly.com/uploads/1/3/5/3/135304311/0963fae592.pdfIn PDF document text
    • https://kefawefixak.weebly.com/uploads/1/3/0/7/130738991/2b2adb0d83.pdfIn PDF document text
    • https://meruvaxog.weebly.com/uploads/1/3/4/8/134877221/4eb7e906c8bdba3.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/nagozoz-dogijix-libodekujojajag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f38ec1c-2a92-492a-b04b-3e4ee320b27b/stanley_battery_charger_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb462d55-6f1c-450c-a0eb-aa60592f5270/what_does_hell_yes_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f484c42-d549-4feb-946b-00e972f3393d/93073657476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22a92b1-1f5b-4259-82dc-55668d930b43/william_james_book_principles_of_psychology_focused_on_which_of_the_following.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00079f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F33 5600 bytes
SHA-256: 4b85d3d5b2c14d8dbc7498051171cf585a60f7c1e08f4f6765ee9b5009eeec38
font_01_sfnt_off0007b227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B227 4000 bytes
SHA-256: e6e653c53f62c09d5a377661769555b70b33af5a76203bae02ff14108a656153
font_02_sfnt_off0007bed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BED3 13144 bytes
SHA-256: 8d0539df5410c917c61e79380a7e6b02d1eabad2003698dc77cdc4e523d319fb

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