Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33b5d5ff445a85c…

MALICIOUS

PDF

97.6 KB Created: 2021-03-26 08:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 570aa0a10be0c7f5732c1d059c81948f SHA-1: b73a189d57541d549c9ecb0f52c14a4c02c118f0 SHA-256: a33b5d5ff445a85c884018cfba67a0f577f51dc13ecf07624ce8dbd03997c2cf
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to drive traffic to external resources, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/123?utm_term=mucoadhesive+drug+delivery+system+ppt PDF link annotation
    • https://nofefikow.weebly.com/uploads/1/3/4/5/134510094/labajem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_60505158e5df2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_603209a03c666.pdfIn PDF document text
    • http://smartcreditscore.info/how_to_make_a_disappearing_nine_patch_quilt_blockjfotd.pdfIn PDF document text
    • http://iranomics.com/93452816923yeoez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_605a723ed6fe0.pdfIn PDF document text
    • http://hookup666.site/college_english_placement_test_practice_questionsbvguq.pdfIn PDF document text
    • http://ritual-venki.online/49638984980pehhz.pdfIn PDF document text
    • http://crawlmqyu.space/kodupeligugoxonot65dx.pdfIn PDF document text
    • http://helpverifedbadges.com/97812371335ibgoo.pdfIn PDF document text
    • http://7lessons.website/najaxakadapotifijogekekubzplcn.pdfIn PDF document text
    • http://firstsecu-paypal.com/how_to_workout_your_legs_with_weightswmt8s.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/gifagi.pdfIn PDF document text
    • https://lasuzolus.weebly.com/uploads/1/3/5/3/135315371/a54fdbe.pdfIn PDF document text
    • http://amandeepsadyora.com/vezijonupuxefqg0ng.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sasufufa/jizojatodizoridetezab.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/zufegufenagumudomumar.pdfIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_202a1b99f7884441b5e6051d9986f6e6.pdf?index=trueIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_2d2bd0297667441299fca7bf7763ccfa.pdf?index=trueIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_192942f74f564f9584c9b1579d5ba43f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/changing_states_of_matter_worksheet_grade_5.pdfIn PDF document text
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_6600a44f2e9c4dcb91cca70a1213025e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/sql_code_formatter_sql_management_studio.pdfIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_4db61d56e9154da393b16a25e6bf0e2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/google_sheets_create_chart_from_pivot_table.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 6888 bytes
SHA-256: 80b0fd73251bc6d2fe270a6343ee66d2ccf6a0584a3ae52741b9cb4b2e38b690
font_01_sfnt_off00011a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A53 2940 bytes
SHA-256: 839c12a992c4f42ab7d6f362c045f6a78be69cb5f2c34a16e88675beed876130
font_02_sfnt_off000125ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EF 5656 bytes
SHA-256: b2c8bb583373d2142113276f09815f37b91fbdb3ee1a6eb4153725ed063526c6
font_03_sfnt_off0001391e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1391E 12348 bytes
SHA-256: 2c6822fd36e575cfb4c9448bf0b3645b9778965124e3ae8406b44aadbf2a496a
font_04_sfnt_off00016227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16227 16112 bytes
SHA-256: da133098c8ec00180ce5fe37c74b807b143adc5860869a2f7b6211e455203b10

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