Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a8cd04e44de44d…

MALICIOUS

PDF

77.3 KB Created: 2021-03-31 19:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e6e2247b416be98090f68cf6e2269ac2 SHA-1: 14840306b06f74306cb8f729870c7eeae108e958 SHA-256: 56a8cd04e44de44d1de277153343bc7f75b066e0f3558911af89415ac7eb0031
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure, suggesting an attempt to distribute malware or conduct phishing. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious lure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=spy+escape+and+evasion+pdf In PDF document text
    • http://dafizejujen.22web.org/letanorelotevew.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/20626469127.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/93961625930.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/87253566499.pdfIn PDF document text
    • http://mivukiwoluwuj.iblogger.org/internet_manager_registration_crack_serial_number.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://uploads.strikinglycdn.com/files/84f5cecc-0ce7-425a-8875-bceeae53e664/bright_starts_playful_pinwheels_bouncer_instructions.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/is_cultural_imperialism_bad.pdfIn PDF document text
    • http://talusulimatedo.rf.gd/70929520878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3134f2ee-ba34-48cd-9153-584df61cc4ed/how_to_write_a_patient_case_report.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_189a160f288840bd9119a87b233dfe5f.pdf?index=trueIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/chaupai_sahib_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a53f8cc-1da3-4d2f-b94f-c1ec61479e9f/bob_evans_thanksgiving_dinner_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb792f84-60dc-46e4-9ebf-6cf37c81469f/41852624139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f82ef0d-8900-4e27-9def-f31758ee0c46/tre_trauma_releasing_exercises_david_berceli.pdfIn PDF document text
    • https://721ea522-a1f6-4523-903e-24b3c8014629.filesusr.com/ugd/5a834c_de60f48001a543ed965ff23779a2e8d3.pdf?index=trueIn PDF document text
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_758a8d9a8d9245f18e629e752e555637.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/551cabe0-a1c6-4fe7-ab5c-bcf03b24a0a4/how_to_set_swann_dvr_to_record_all_the_time.pdfIn PDF document text
    • http://titomozuluvexov.epizy.com/genetec_video_player_free.pdfIn PDF document text
    • http://wubuxosivukip.epizy.com/61453963218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17aab1b5-258e-471b-a019-1601798b5db6/evermore_alyson_noel.pdfIn PDF document text
    • https://52431b39-7396-4b0c-bcaf-ab72d449a1bf.filesusr.com/ugd/f8cef3_594f028a2ae145c99803a231c86d9626.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c762aad-703c-401a-b46b-22fc99fe64ab/26937143613.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_b8f29e53b08741ff9d0c4849a73b766b.pdf?index=trueIn PDF document text
    • http://lojetewope.epizy.com/80741212403.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_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 4992 bytes
SHA-256: 9a7d92d161132f65db5d60ebe299ff732e63106466a0e04dfe7916e2bf021d35
font_01_sfnt_off0000f27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 11044 bytes
SHA-256: 6c8703cd3fd2e8fce25f2400d220617a26c080bcff90af8def33ec0db41780a6
font_02_sfnt_off00011833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11833 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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