Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec1009afb016a4b…

MALICIOUS

PDF

76.3 KB Created: 2021-03-11 09:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b5829403b59c13dc42328855d88553a5 SHA-1: a4a506197f7ea566e6ca04996152e77e5fe71acf SHA-256: eec1009afb016a4bafe5f02d85cfd07dca57ca7ec5045334886204e03bbd9c12
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to contain search-related keywords, reinforcing the phishing pretext. No scripts were extracted, but the presence of external links points towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://botokaw.ru/award?keyword=britannica+illustrated+science+library+pdf PDF link annotation
    • https://cdn.sqhk.co/dukoredod/jhgcl88/live_slime_wallpaper_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_6023ccd15a607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384149/normal_5fe5607527dc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417813/normal_5fc915fe430fe.pdfIn PDF document text
    • http://apparently-home.com/bearcat_scanner_bc355n_manualf6489.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/FiZ2iiW/13471651628.pdfIn PDF document text
    • http://semengergel.ru/what_do_you_eat_on_a_high_alkaline_dietzmmhw.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/jhhdx8A/dazeferaris.pdfIn PDF document text
    • https://cdn.sqhk.co/zezerixuwab/yWieoXi/71992301184.pdfIn PDF document text
    • http://bilkan.fun/6361338094103o0k.pdfIn PDF document text
    • https://cdn.sqhk.co/mazinenik/X9hhoid/69010791337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_601b81a13e956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_600b38639e044.pdfIn PDF document text
    • http://organicnu.info/100744665304g2an.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/hehgYji/49057987066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464080/normal_6047d5ff372a1.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/fii94ia/map_of_england_counties_blank.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://s3.amazonaws.com/tozaduliwubega/scratch_full_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/creature_of_fenkenstrain_quick_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/android_studio_update_app_version.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_off0000e17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17C 5212 bytes
SHA-256: 5860469a75b4eb5e9169d46a180abea041d9ae157bb0a7f76c56e2d836cbae46
font_01_sfnt_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 10360 bytes
SHA-256: 6b7d4693779c9db7b432d5a0a6ea9d179a05776acdfb9ac8975a036ebba75b77
font_02_sfnt_off000115af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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