Malicious PDF — malware analysis report

Static analysis result for SHA-256 859aeba8c41b94d2…

MALICIOUS

PDF

79.1 KB Created: 2021-03-05 00:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: afed23ca4d228b04567712923d609046 SHA-1: 390791e848ef091595240b7dc1576bed83f0f26f SHA-256: 859aeba8c41b94d2b891b0d16c80104d5262b1d4f1c50371860369ad25e7f769
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is a link farm, directing users to external URLs. One such URL, 'https://lozipotod.ru/strik?utm_term=chronological+order+of+marvel+movies+imdb', is presented as a search result, likely a lure. The presence of ClamAV detection and ML classification further supports its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

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://lozipotod.ru/strik?utm_term=chronological+order+of+marvel+movies+imdb PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447663/normal_5febee63ed212.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/ji2ggjf/49165440874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_603847e442270.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469623/normal_5fc6d5eb09f43.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/bililop.pdfIn PDF document text
    • https://monaxakapivelor.weebly.com/uploads/1/3/1/1/131164425/46767d9437fa46.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/a9WhcXG/stupid_zombies_game_download_uptodown.pdfIn PDF document text
    • https://mebemawadaj.weebly.com/uploads/1/3/5/2/135295691/6df18c3afd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5ff49c1569f7a.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/cMRr0ie/etisalat_business_in_a_box_contact_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fecf2ac0d5dd.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/didurebisuxoxiz-lefomu-zuliremer-xuwumi.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/gopuze/javiserofejotozusowuzifub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e616369c-a0f6-47d5-a6c2-3b34e1de062a/la_la_land_last_scene_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/b._a_m._d._u_date_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518719bf-5087-467f-84a1-fc2054f6b07a/diono_radian_rxt_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba97aba-5699-40a5-bf2c-1aebca6e80e9/22226216998.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/46696199160.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/72_angels_of_magick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b608444-deb3-41ec-80aa-0799d555dfdc/muboreno.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/everyone_can_create_video_project_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482cb7f2-7e99-49d1-bf7b-c920340f1ae7/beats_studio_3_replacement_ear_pads_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/42718348632.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/data_warehousing_and_data_mining_notes_for_cse_7th_sem.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_off0000f694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 5540 bytes
SHA-256: fd09a39e26fad34bf628d11079d1a28caf0f82d711f81e34a805dec30a91b798
font_01_sfnt_off00010946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10946 10876 bytes
SHA-256: 25f1a21a813c58533a84022b755fde6a90f74c47202d7cad6641d4ca53120f1f

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