Malicious PDF — malware analysis report

Static analysis result for SHA-256 018ccb918277ed03…

MALICIOUS

PDF

78.1 KB Created: 2021-03-18 02:26:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e45faa444402d75820832d6848c46c73 SHA-1: 51f25b9ab481eb6c92dfc3b08f3e832652fafbd5 SHA-256: 018ccb918277ed039551599e67e93d4380d48608454fc34b2fbe3844fc650841
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or directing users to malicious sites. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of links, suggesting an attempt to manipulate search results or distribute malware through a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://pelibifir.ru/wix?keyword=bdo+level+guide+61
    • https://bajiwemijowulu.weebly.com/uploads/1/3/5/9/135990815/gewikowoma.pdf
    • https://cdn-cms.f-static.net/uploads/4453098/normal_603d2831caf57.pdf
    • http://1xbets-regs.site/kamobo6hzqw.pdf
    • https://cdn-cms.f-static.net/uploads/4479433/normal_601ed5326c6bd.pdf
    • http://googsnat.space/521128065293ru4m.pdf
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/kelomig-dijunetogeku.pdf
    • http://prosucre.pro/sign_of_the_chrysanthemum_chapter_summaryf1xpc.pdf
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5fd9c0febf93f.pdf
    • https://cdn-cms.f-static.net/uploads/4459917/normal_5fd7c21d5e982.pdf
    • http://kartaidatodemeleri.com/free_excel_construction_cost_estimate_templatejsg0m.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tonisefoteka/how_to_use_wagner_power_steamer_715.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/negenosevigeta.pdf
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_f032bc913ed1401a96baa07efe6b3820.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0d839bd5-ad6e-41f4-855d-ffc9d00af438/5949543978.pdf
    • https://s3.amazonaws.com/retisovojor/jexexijizefijunutow.pdf
    • https://s3.amazonaws.com/migivewuwe/suvisewotuxunari.pdf
    • https://uploads.strikinglycdn.com/files/e6096191-925e-42a0-9006-ed3375838669/what_is_capital_budgeting_in_simple_words.pdf
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_a6f54076ebfd43eb9157ecffb2d40631.pdf?index=true
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_1721d58cf3da43c9895b7d2d5c8adb2a.pdf?index=true
    • https://s3.amazonaws.com/tobobowu/11659249868.pdf
    • https://uploads.strikinglycdn.com/files/b218887f-36fd-4a56-a6d8-227c0482582f/data_communication_and_networking_ppt_forouzan_free_download.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_off0000e879.bin
e758e67b9b66012c5f4be906f7bc8572a00adea0a70c9ca187a7af3de4a85aec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 4520 bytes
font_01_sfnt_off0000f7e9.bin
f1a875dc8438b6d1712e047f11b51ec7da0e7bf2d680c360b76067bdd2c943f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E9 10968 bytes
font_02_sfnt_off00011d5b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5B 4324 bytes

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