Malicious PDF — malware analysis report

Static analysis result for SHA-256 82913604d69bb4af…

MALICIOUS

PDF

76.2 KB Created: 2021-03-14 10:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 144345791deb36899259cec24ec5b70f SHA-1: 2689c3f602b72140c360532c2430b68a1d1b302b SHA-256: 82913604d69bb4af6349bae3b0b802e9e98d64d246e0aa1addaaf5b802f16f06
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm. The primary malicious URL, https://botokaw.ru/wix?keyword=prc.com.ph+let+result, is likely used to redirect users to further malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/wix?keyword=prc.com.ph+let+result PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370266/normal_600f4d31af777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472766/normal_5fe49fe767495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485689/normal_600e725f4b38f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482418/normal_5fc9f9269ac4f.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/kobivimelelo/transport_canada_rpp_flight_test_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83ecccc-59cd-4e95-aff7-f05adf452887/how_do_you_fix_a_furnace_that_blows_cold_air.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/physics_volume_2_halliday_resnick_krane_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/azur_lane_android.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/zijasuragazomo.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/curious_george_full_episodes.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/free_joomla_responsive_templates_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec553e9-e057-422b-ab0b-c226c76161d5/how_much_do_software_engineers_make_in_dubai.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_5498a5f987f44f7f97cd1ede08fc8a96.pdf?index=trueIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_0395d015b4c343fab273673fa381bed2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/numezatozenavesewiti.pdfIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_7ad7ce40f8db40d787ff7a82c13576eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab35d4a-6301-43f4-8ac1-a24190a41c24/technical_analysis_for_options_trading.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/calling_bell_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf61aa7-6b94-450c-a65c-2676304c97fb/56273862795.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/30496925491.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/how_long_does_it_take_to_dry_food_in_a_dehydrator.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/lavadora_brastemp_clean_11kg_manual.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_3da7b54924ad4653a122ea67f0c9c982.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dixaleko/career_path_template.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 4996 bytes
SHA-256: bf4d017f42e598190063246cfa347e7f787d748b099c2b822cd6c902ff44c8e9
font_01_sfnt_off0000feca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECA 10768 bytes
SHA-256: cc9bc4cdb8ee09a4323eb4adeab493a7aeaa2844145a058c535a48e79f50551e

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