Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f07da123a87809a…

MALICIOUS

PDF

81.8 KB Created: 2021-04-02 22:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5d24074faf135b61974f788268471fc3 SHA-1: fc0eae1a5174e10e040ddc6beb6e2532d4a889d6 SHA-256: 6f07da123a87809ae32dd0b3fcfe3adc7bbd27b418dfca2694a69504fde6ae27
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to drive traffic or distribute malware. The presence of a URL related to 'bihar stet science question paper 2020 download pdf' indicates a lure to attract users searching for specific content. ClamAV and ML classifiers also flagged this file as malicious, reinforcing the suspicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8728

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://soxebez.ru/award?keyword=bihar+stet+science+question+paper+2020+download+pdf PDF link annotation
    • https://cdn.sqhk.co/leredupodeka/jgijSJs/pokemon_sword_and_shield_darkness_ablaze_setlist.pdfIn PDF document text
    • http://qlemelest.online/8816467867wlnrz.pdfIn PDF document text
    • https://cdn.sqhk.co/xetorexevapi/54kjiI4/ringtone_rock_music.pdfIn PDF document text
    • https://jafelabuz.weebly.com/uploads/1/3/1/3/131398525/kelozataxizonusori.pdfIn PDF document text
    • http://50offit.pro/how_do_i_put_my_anker_speaker_in_pairing_modezh8vr.pdfIn PDF document text
    • http://quickpapp.online/how_to_install_specialized_speedzone_sport_wireless40e6d.pdfIn PDF document text
    • http://lefuduzitenazig.22web.org/cement_board_installation_guide.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/4560332.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/dWijbmP/friday_the_13th_killer_puzzle_daily_death_walkthrough.pdfIn PDF document text
    • https://vujoxakot.weebly.com/uploads/1/3/4/3/134318531/sariro-golubimek.pdfIn PDF document text
    • https://lonofajizol.weebly.com/uploads/1/3/5/3/135389348/c75ef.pdfIn PDF document text
    • http://fitokaps.xyz/fundamentals_of_differential_equations_8th_edition_nagle_solutions_manualtda7c.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
    • https://s3.amazonaws.com/nijudow/pujelozivakikavinaleri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943f33a3-a3fd-49ab-a0ca-3b02fed75562/sanyo_32_inch_tv_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c47529-6923-4b73-b355-7562d3c1e99a/bosch_axxis_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d31682cd-52a5-48e3-9707-1758b313194b/cabelas_8.7_pro_series_food_slicer_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/manually_update_windows_10_1809_to_1903.pdfIn PDF document text
    • http://munowesixebo.rf.gd/dadivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff23007-3b2d-4742-b71f-bd56a74e05a2/bluetooth_keyboard_for_ipad_pro_9.7_and_ipad_air_2.pdfIn PDF document text
    • http://kasupitebuse.rf.gd/star_maa_telugu_tv_guide.pdfIn PDF document text
    • http://jerovewoxisabu.epizy.com/horror_story_hollywood_movie_free.pdfIn PDF document text
    • http://rijewetevoxo.rf.gd/werejut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2221283-1815-4705-aa8a-f708010f09bd/66242494195.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 5784 bytes
SHA-256: 0108fd148f6c574b66fd4ba2b48c83bcca682d6e26fedb32629084362cbd9b2f
font_01_sfnt_off000101f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F6 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00010d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5A 11096 bytes
SHA-256: f0453fb2fb51c14d0572a748ae733f2316b93635c5408236e97f95985bbe22af
font_03_sfnt_off00013375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13375 5336 bytes
SHA-256: 8716b0047263f6f9f62146f4fe5f70f512a5fbdd02df7d7d055060c3ff655e5f