Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f102f56e985fbb…

MALICIOUS

PDF

78.9 KB Created: 2021-05-08 18:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e5fd9f2eebcaa0ca3be400afdce1c02e SHA-1: 765529cf475a3d61d0ee854a51880a9c9e1f16d7 SHA-256: 52f102f56e985fbb3dccdfe230266514abd0da4046b13a8c1c8410936e9417c3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or redirect to the malicious domain jottigo.ru. The document body, though heavily obfuscated, suggests a lure related to cryptocurrency trading, which is a common phishing tactic. The presence of external URIs and link farm characteristics indicates an attempt to drive traffic to malicious sites.

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://jottigo.ru/strik?utm_term=2005+nissan+murano PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404757/normal_605a2b9da3533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421970/normal_601eea5737af2.pdfIn PDF document text
    • http://theharaka.online/gamuwawudigaruzuyf7mg.pdfIn PDF document text
    • http://2022god.com/jijukevaxosv0z5a.pdfIn PDF document text
    • http://card2card-perevod24.site/string_format_c_date_yyyy_mm_dd0lfu5.pdfIn PDF document text
    • http://copyrightproblem.com/gidefopakijolafn105n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_601530bf7d4e0.pdfIn PDF document text
    • http://a1metromovers.com/tanutofugrd685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482405/normal_5fdc5edb6e1c4.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/4e65acad-cf2c-41d4-ac3f-095a70c949d9/how_to_trade_crypto_on_robinhood.pdfIn PDF document text
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_c3d476e05a2e46378a34e6a1daed35af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lerezazo/appium_scroll_down_android_c.pdfIn PDF document text
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_1f969aee34c44a9b9bfe2617c85a5451.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bivanud/dorexofas.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/loctite_si_596_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/narrative_essay_outline_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b118e83-703f-46e6-8cd9-ccd6a23ce71a/lobovibonobaxotisurur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736b7e52-e067-49a7-bfd8-cf0dfd7ef331/the_magic_rhonda_byrne_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/51692318494.pdfIn PDF document text
    • https://8084a2ae-6cfb-493d-8155-0d4219c0f7e3.filesusr.com/ugd/5b3528_a174a101934349fb8f203e94812bcb66.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c4d1f7-c367-4b52-aaee-e3e29cf47845/is_the_taco_bell_triplelupa_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e660fe-9408-41ec-945a-d417300b3e35/juvujejez.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 5104 bytes
SHA-256: 89d55f819a954f297cf85bd66ce35d78855bf9cb150cc7c4577ed6b2cbe1ced4
font_01_sfnt_off0000ff95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF95 16696 bytes
SHA-256: 0960f322df0bf8efc74067f7cfe0bbe60e44583126b8141f47bfc5c075787c57