Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6cb10b1950f514…

MALICIOUS

PDF

86.5 KB Created: 2021-03-10 14:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 419fc19edbfdf113dc28906ba09c7e75 SHA-1: 690cbf7212a2f45fc1b100e2211cd2b8ff6da7b4 SHA-256: aa6cb10b1950f5149352cea445b78889754ef7af2719f6385357e2de8005fb91
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged by ClamAV as Pdf.Phishing.Trojan. The primary URL, 'https://dugedepap.ru/wix?keyword=lumber+tycoon+2+op+gui+script', suggests a lure related to gaming or software scripts. The ML classifier strongly indicates maliciousness, supporting a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/wix?keyword=lumber+tycoon+2+op+gui+script PDF link annotation
    • https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/f6d08e.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/minn_kota_riptide_80_pound_thrust.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/dexunulesonezifolagudagow.pdfIn PDF document text
    • https://kabudinikibe.weebly.com/uploads/1/3/4/7/134716255/sekatepobusozus.pdfIn PDF document text
    • https://tapuroxoj.weebly.com/uploads/1/3/4/5/134599682/5599936.pdfIn PDF document text
    • https://tiselewo.weebly.com/uploads/1/3/1/6/131606631/xawegoxanikipi.pdfIn PDF document text
    • https://nuzukozifazo.weebly.com/uploads/1/3/2/6/132682871/7904016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_bd7cfe570c6c4fa6b34214ad28f22d13.pdf?index=trueIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/vubebasirilusadolato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c659075-ba4f-4075-be4d-ae1b2a454991/kakigob.pdfIn PDF document text
    • http://sulorowanutabu.atwebpages.com/4_quart_crock_pot_dinner_recipes.pdfIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_e958929a1876407aa1eebbc1c54c2890.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3794e7-483e-4a2f-a640-776920afe72f/89870682192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c601243e-b6e1-4edd-952d-c960a620bfd5/10_mejores_carreras_para_estudiar_en_colombia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23958078-5f86-49db-af8e-ec1189b8cfd2/15506092034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4920917-641b-4184-8560-4df10dff4f9d/mujebenametuxepazanagone.pdfIn PDF document text
    • https://a29d81ee-e589-4368-99bd-4e0be04eb4c0.filesusr.com/ugd/a89e6e_358a964bcc364027ac7dc18e090cbdb9.pdf?index=trueIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_2e289fdba7fe4827a5994eb6fa196b7b.pdf?index=trueIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_430d608b2b8d443ab5ec86d4900f608f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9d618b-c918-433c-8a44-0d0a2b40cad8/form_an_alliance_crossword.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_c404cc39a45d49c1902576eb2c208e06.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33c87987-d18d-4f37-ba61-da8bde2c81cb/anxiety_worksheets_for_young_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e918d8c-2492-441c-a77d-c2d99337a41e/95075268863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58bed158-f0e1-4e20-9bbe-583a96647d38/factoring_mixed_review_worksheet_1_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC86 5208 bytes
SHA-256: b5bbbe72b04889aab88bdce531faf7bb8025c65c685fa443a03d98a619266fa1
font_01_sfnt_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 14676 bytes
SHA-256: f2d59283c3bcd70bd893f503d79e33dbc06fea940e30b4ac59e362879889c4e5
font_02_sfnt_off00013bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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