Malicious PDF — malware analysis report

Static analysis result for SHA-256 e109b12367356edc…

MALICIOUS

PDF

99.9 KB Created: 2021-03-14 09:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8f45fe1e0c6240cf3c7459b0d93b984f SHA-1: 9002445d8242d48d21f7dec8d3e02f61be06e2e4 SHA-256: e109b12367356edc74bb83bd563027020383d8998fd2b168a886b8493805729c
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 hosted on disposable domains, indicative of a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9422

Heuristics 6

  • 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 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://druttle.ru/award?keyword=flora+microbiana+normal+de+la+piel+pdf PDF link annotation
    • https://cdn.sqhk.co/wovenebi/FiigXih/child_s_play_1998_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/fekebazi/ggidXih/reporter_jequi_urgente.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/dd6cd4825d9b7.pdfIn PDF document text
    • http://nuzadovokebin.iblogger.org/masonry_construction_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/hcii8ja/16330815366.pdfIn PDF document text
    • https://salobomuxalevi.weebly.com/uploads/1/3/1/0/131070078/dowig_xevoda.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/8224454.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/jhjhJha/four_color_block_puzzle.pdfIn PDF document text
    • http://javopivabo.iblogger.org/79643699730.pdfIn PDF document text
    • https://cdn.sqhk.co/pixukinoma/dl6giE4/strike_fighters_2_north_atlantic_download.pdfIn PDF document text
    • https://denutuzuno.weebly.com/uploads/1/3/4/7/134706868/a808778c093a19b.pdfIn PDF document text
    • https://cdn.sqhk.co/faruzikako/VoDhesy/48872650797.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/PBjfhfP/3_doors_down_away_from_the_sun_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/eNgc5ig/uniwars_black_italic_font_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ratosakip/gjiakGx/bet_streaming_shows_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/telivagawu/aEiekCZ/47201561776.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4d58b4-2ccf-4508-aff6-23c34b0a3e24/mapinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72dff9d-4a3b-4aef-a003-3bb16fa22703/ge_profile_microwave_buttons_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4960ac6-b84b-41a4-b13c-18cdc1df777e/how_to_reset_verifone_mx925.pdfIn PDF document text
    • http://rokupin.rf.gd/pioneer_avh-120bt_bluetooth_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08856159-63e8-43c9-9cdb-eeaf46995438/15927780401.pdfIn 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_off000155ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155BA 5216 bytes
SHA-256: 5140570f8b8b3f8d223c2ba2081ff552508d083f7421ee76c61e1191f939126c
font_01_sfnt_off0001675c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1675C 12436 bytes
SHA-256: 1ec3ab5e19ef5d043d3f1a0bb1aca182bcf33c78ce587803a7a08cba17db981f

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