Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cb79943a6332be…

MALICIOUS

PDF

159.7 KB Created: 2021-06-15 12:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 41f565d12ace9a2e6eed236e5dfb7900 SHA-1: 95ad271fac7cc3334dd11f64bc9cc827f7827d52 SHA-256: 00cb79943a6332be863a4da0cc366b6b900f5e9c07f309201d91c055cc19d339
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains multiple embedded URLs, with a primary link to 'allytemp.ru' that is likely a phishing lure for textbook solutions. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to distribute potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious activity, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8602

Heuristics 4

  • 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 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
  • 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://allytemp.ru/pbw?utm_term=bs+grewal+43rd+edition+solutions+pdf+free+download PDF link annotation
    • https://wovuwujofisup.weebly.com/uploads/1/3/1/8/131856276/rufivuxigiv-nilajuxu.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/limujut.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/pegujo_tujavola_niwulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://tujezowosop.pbworks.com/w/file/fetch/144737133/45635394085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9dee68c-39e4-4941-a114-37592d8e509f/26049852083.pdfIn PDF document text
    • http://pobonagul.pbworks.com/w/file/fetch/144630474/vameteludotodevinizun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c82c912-8242-4f71-b0e6-6bb28faa6250/emergency_care_and_transportation_of_the_sick_and_injured_11th_edition_answer_key.pdfIn PDF document text
    • http://tijigika.pbworks.com/w/file/fetch/144674190/computer_organization_and_design_risc-v_edition_solutions.pdfIn PDF document text
    • http://kimiwodevus.pbworks.com/f/toxegipipug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f25041-3ecc-402d-a08b-073daab3a99f/arduino_uno_r3__esp8266_wireless_wifi_shield.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90495d2-6c2f-46ca-af4f-a0cf6715b986/how_to_adjust_temperature_on_rv_water_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3e568f-b141-4144-94e9-1769dbed3f50/128491754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8019ba7d-99bf-4b25-b25e-8c2df6b687b2/suzovezakesezomimovudiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0163c3-037a-45b7-af81-79c5fcff0304/10902325220.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/w/file/fetch/144414294/vuxiwovadugugoteferu.pdfIn PDF document text
    • http://sovafiben.pbworks.com/f/angular_2_tutorial_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cfedfd8-f314-4d31-b763-fd680fceb9e7/69871303649.pdfIn PDF document text
    • http://joraxakegeg.pbworks.com/w/file/fetch/144553539/patching_system_image_unconditionally_asus_zenfone_2_laser.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A59 13688 bytes
SHA-256: 2194eff535a91621f6155fd7fb5021aa004acbee7abac505b54fffa4a3b8c52f
font_01_sfnt_off00023777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23777 5600 bytes
SHA-256: 3d8d305c81df43ddc02bd92c0c06b3d9bc620f2c5caa1f6dbb800e34a02cdef0
font_02_sfnt_off00024ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24AB0 3848 bytes
SHA-256: e4241ca059e9f8ca43985fb0f5d8f08de09d105be3227282ad6e58d1d51fdcaf
font_03_sfnt_off0002588d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2588D 2900 bytes
SHA-256: c5e2c1c7e68d2f71b46363c300bc42262963212c9d6ba65d922d08e04d963ed1

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