Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4036a14d36790eb…

MALICIOUS

PDF

125.5 KB Created: 2021-03-07 18:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f332a0e97a7c01c138b06e14a5732c87 SHA-1: 04a4896ab3e3e0eb61c065e3ab00e09775665bd6 SHA-256: e4036a14d36790eb6c8e35b4c1fb529b4c122a97db92bba80dac4c43a51d66f7
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/wix?keyword=skam+italia+season+3+episode+2+online PDF link annotation
    • https://ribiridoxa.weebly.com/uploads/1/3/0/8/130874248/kogoximowolu-fogoguvakir-gujilidujino-loseka.pdfIn PDF document text
    • https://giwuvapelefawi.weebly.com/uploads/1/3/4/8/134869604/dojaxavapofoxuvafu.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/53018552230.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/fufevozenetiwox.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/lutugimitu.pdfIn PDF document text
    • http://nunobuzipame.medianewsonline.com/borevutogekowibatolowikes.pdfIn PDF document text
    • https://buvonumonub.weebly.com/uploads/1/3/5/3/135304713/luzatinitu.pdfIn PDF document text
    • https://papenuxid.weebly.com/uploads/1/3/0/8/130874395/ae3ea89b46ad.pdfIn PDF document text
    • http://jidapuxedepu.medianewsonline.com/2987733479.pdfIn PDF document text
    • http://walafim.22web.org/marcy_weight_bench_parts.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/42187999766.pdfIn PDF document text
    • http://nunobuzipame.medianewsonline.com/tenergy_universal_smart_charger_blinking_red.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/subject_and_object_pronouns_worksheet_with_answers.pdfIn PDF document text
    • http://zutaturusix.myartsonline.com/pipojapelinelimuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/wizarding_world_apk.pdfIn PDF document text
    • http://bujazux.rf.gd/western_plow_unimount_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/formation_of_barium_sulphate_precipitate_experiment.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_74985163b6024c7b88c7b5b4a101208e.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_0a2d6e5aef2e42f19ef8ed0d7f558456.pdf?index=trueIn PDF document text
    • http://wabipoxagapez.rf.gd/sagerurewebezafa.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/xunakipevix.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_off0001a873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A873 5472 bytes
SHA-256: 11cd37582fa0dbdf307722062c3c3b9592cfd7c8fb94d67689e2c1b3afa96aa9
font_01_sfnt_off0001bb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB02 14316 bytes
SHA-256: 6787e9c24b2f4741258557d149b52f62a4f58bbde69924527de0505e54256d0f

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